295 free tools · no sign-up

Free Online Tools for PDFs, Images, Text and Developers

Browser-based converters and utilities — most files stay on your device, uploads are time-limited, and you never need an account to start. Use ToolSphere for PDF, image, text, and developer tasks with no sign-up.

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295Live tools

20Categories

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AI Audio Calc Design Dev Learn Generate Health Image Kids PDF Secure SEO Text Utility Video Writing

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Private by design

Client-side tools keep your files on your device

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Instant results

No queues, no accounts — open and use

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Works everywhere

Desktop, tablet, and mobile friendly

What is ToolSphere?

ToolSphere is a collection of 295 free online tools, practical programming courses, and a live code editor for everyday digital work and learning.

Use the platform to convert files, edit images, format code, study lesson material, and practice directly in the browser. Whether you need to merge a PDF, resize an image, follow a course lesson, or run Python code online, ToolSphere keeps the workflow simple and private.

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AI Tools

4 free tools ready to use

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AI Text Detector

Analyze writing patterns to estimate AI-assisted content signals.

AI Text Humanizer

Rewrite AI-generated text to sound more natural, varied, and human-written.

Paraphrasing Tool

Rewrite sentences with synonym replacement for fresh phrasing.

Remove AI Watermark

Remove corner AI watermarks and logos from generated images in your browser.

Audio Tools

5 free tools ready to use

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Audio Converter

Convert audio between WAV and other browser-supported formats.

Audio Cutter

Cut and trim audio clips with start and end times.

Audio Joiner

Merge multiple audio files into one continuous track.

Text to Voice

Convert unlimited text into natural speech with progress tracking, voice choices, playback speed, and downloadable audio.

Voice to Text

Turn live speech, audio files, or video into accurate text you can copy and download — powered by on-device Whisper AI.

Calculators

49 free tools ready to use

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Age Calculator

Calculate your exact age in years, months, and days from your date of birth — plus next birthday countdown.

Aspect Ratio Calculator

Calculate and scale aspect ratios for images and video.

Auto Loan Calculator

Estimate car-loan payments, interest, total cost, taxes, trade-in value, and extra-payment savings.

Average Mean Median Calculator

Calculate mean, median, mode, and range from a number list.

Basic Calculator

Everyday arithmetic calculator in your browser.

BMI Calculator

Check your Body Mass Index with metric or imperial units and see your healthy weight range instantly.

BMR Calculator

Estimate basal metabolic rate and daily calorie needs using the Mifflin-St Jeor equation.

Body Fat Calculator

Estimate body fat percentage with the US Navy method.

Calorie Calculator

Estimate daily calorie needs (BMR and TDEE).

CGPA Calculator

Calculate cumulative GPA (CGPA) from semester SGPAs and credit hours — 10-point or 4-point scale.

Compound Interest Calculator

Calculate compound interest growth over time.

Credit Card Payoff Calculator

Estimate credit-card payoff time, interest, and the payment needed for a target date.

Date Calculator

Count days between two dates or add and subtract days, weeks, months, and years from any date.

Days Until Date

Count days until any future date.

Debt-to-Income Calculator

Calculate front-end and back-end debt-to-income ratios from monthly income and obligations.

Discount Calculator

Find sale price and savings from a percentage discount.

ERA Calculator

Calculate baseball earned run average (ERA) from innings pitched and earned runs.

Exam Marks Calculator

Add subject marks, get total score, percentage, grade, and pass/fail for exams.

Fraction Calculator

Add, subtract, multiply, and divide fractions.

Fuel Cost Calculator

Estimate trip fuel cost from distance and efficiency.

GPA Calculator 4.0

Calculate US 4.0-scale GPA from course credits and grades.

Ideal Weight Calculator

Find ideal weight ranges from height and sex.

Islamic Zakat Calculator

Estimate Zakat on cash, gold, silver, investments, business assets, and receivables using gold or silver nisab.

Loan Calculator

Calculate EMI, total interest, and repayment summary for home, car, or personal loans.

Matrix Calculator

Calculate determinants, inverses, and 2×2 matrix products.

Mortgage Calculator

Estimate mortgage monthly payments and total interest.

Ovulation Period Calculator

Estimate fertile window and next period from cycle data.

Percentage Calculator

Find X% of a number, what percent one number is of another, and percentage increase or decrease.

Plate Weight Calculator

Estimate steel or metal plate weight from length, width, thickness, and material density.

Pregnancy Due Date Calculator

Estimate due date and pregnancy week from LMP.

Prime LCM GCD Checker

Check primes and calculate LCM and GCD.

Quadratic Equation Solver

Solve quadratic equations for real and complex roots.

Ratio Calculator

Free online ratio calculator. Instantly solve, simplify, scale a ratio to a total, or find a missing part. No sign-up — runs in your browser.

Retirement Calculator

Project retirement savings with contributions and returns.

ROI Investment Calculator

Calculate ROI, annualized return, net profit, break-even time, and compare investments.

Room Area Calculator

Calculate five room shapes, convert area units, and estimate flooring waste, packs, and cost.

Running Pace Calculator

Calculate running pace, speed, distance, or finish time with common race projections.

Salary Hourly Wage Calculator

Convert seven pay periods with custom schedules, overtime, bonuses, and take-home estimates.

Savings Goal Calculator

Calculate the monthly contribution needed to reach a savings goal with compound growth.

Scientific Calculator

Evaluate scientific expressions with trig, logs, powers, memory, history, and three angle modes.

SGPA Calculator

Calculate weighted SGPA, project CGPA, analyze course impact, and plan target grades.

Simple Interest Calculator

Calculate or solve simple interest, principal, rate, and time with growth charts and comparisons.

Speed Distance Time Calculator

Solve speed, distance, or time with unit conversion, pace, arrival planning, and a journey graph.

Standard Deviation Calculator

Calculate mean, variance, standard deviation, range, and count for sample or population data.

Tax GST VAT Calculator

Add, remove, combine, or reverse GST/VAT and estimate progressive tax with custom brackets.

Time Calculator

Calculate exact intervals, add or subtract time, sum durations, convert units, and visualize timelines.

Tip Calculator

Calculate tips with tax, rounding, equal or weighted splits, and reverse tip-rate solving.

Triangle Calculator

Solve a triangle from three side lengths, including angles, area, perimeter, and classification.

Working Days Calculator

Count working days, plan deadlines, exclude holidays, and visualize your work schedule.

Design Tools

11 free tools ready to use

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Color Blindness Simulator

Simulate how images look with common types of color blindness.

Color Contrast Checker

Check WCAG contrast ratio between foreground and background colors.

Color Palette Generator

Generate harmonious color palettes from a base color.

Color Picker

Pick colors from a wheel or sample pixels from any uploaded image.

CSS Border Radius Generator

Visually build CSS border-radius values and copy the snippet.

CSS Box Shadow Generator

Visually build CSS box-shadow values and copy the snippet.

Favicon Generator

Generate 16×16, 32×32, and 180×180 favicons from your logo.

Gradient Generator

Build CSS linear and radial gradients and copy the code.

Pattern SVG Background Generator

Create seamless CSS background patterns and copy the code.

QR Code Generator

Create custom QR codes with colors, sizes, and optional logo overlay.

QR Code Scanner Reader

Scan and decode QR codes from camera or uploaded images.

Developer Tools

28 free tools ready to use

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Base64 Encoder/Decoder

Encode and decode text or data to Base64 in one click.

Base Converter

Convert numbers between binary, decimal, hex, and octal.

Color Converter

Convert colors between HEX, RGB, and HSL formats.

Cron Expression Generator

Build cron schedule expressions with a visual picker.

CSS Formatter

Beautify or minify CSS in your browser — no upload required.

Domain Age Checker

Check domain age, registration dates, registrar, DNS records, SSL certificate, and website details.

Gitignore Generator

Build a .gitignore file for your tech stack in one click.

HTML Entity Encoder

Encode and decode HTML entities safely in your browser.

HTML Formatter

Beautify or minify HTML markup for readable code output.

HTTP Status Codes

Look up HTTP status code meanings quickly.

JavaScript Formatter

Beautify or minify JavaScript code for readable, compact output.

JSON Formatter

Format, validate, and minify JSON with readable syntax highlighting.

JSON to CSV Converter

Convert JSON arrays to CSV and CSV back to JSON instantly.

JSON XML Converter

Convert JSON to XML and XML to JSON instantly.

JWT Decoder

Decode JWT tokens safely in your browser — header and payload as JSON.

Markdown to HTML

Convert Markdown syntax to clean HTML with live preview.

Meta Tag Generator

Generate SEO meta tags, Open Graph, and Twitter Card HTML.

Mock Data Generator

Generate fake names, emails, phones, and JSON test datasets.

Regex Tester

Test regular expressions live with match highlighting and flags.

Site Map Chart Maker

Build an interactive website structure chart from an outline, preview layouts, and download PNG, SVG, JSON, or interactive HTML.

SQL Formatter

Beautify SQL queries for readable formatting.

String Escape Unescape

Escape and unescape strings for JSON, HTML, URL, and JavaScript.

Unix Timestamp Converter

Convert Unix timestamps to dates and back in any timezone.

URL Encoder/Decoder

URL-encode or decode strings for safe use in links and APIs.

User Agent Parser

Parse browser user-agent strings into browser, OS, and engine.

UUID Generator

Generate cryptographically random UUID v4 identifiers in bulk.

XML Formatter

Format and minify XML in your browser.

YAML JSON Converter

Convert between YAML and JSON (basic YAML subset supported).

Education Tools

6 free tools ready to use

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Citation Generator APA MLA

Generate APA and MLA citations for books and websites.

Flashcard Master

Create, study, and manage flashcard decks with spaced repetition.

Pomodoro Study Timer

Focus with Pomodoro work and break timers in your browser.

Quiz Maker

Build and take quizzes locally in your browser.

Random Name Number Picker

Pick a random name or number from your list.

Typing Speed Test

Measure your typing speed (WPM) and accuracy.

Generators

7 free tools ready to use

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Business Name Generator

Generate brandable business name ideas from keywords.

Decision Maker Yes No Wheel

Make a quick random yes/no or custom decision.

Fake Name Address Generator

Generate fake personas for testing forms and demos.

Random Quote Generator

Get inspirational quotes at random and copy them.

Random Word Generator

Generate random English words instantly.

Story Plot Generator

Generate writing prompts with character, setting, and conflict.

Username Generator

Generate username ideas from your name or keywords.

Health & Fitness

8 free tools ready to use

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BMR TDEE Calculator

Calculate basal metabolic rate and daily calorie needs (TDEE).

Heart Rate Zone Calculator

Calculate training heart-rate zones from your age.

Macro Calculator

Split calories into protein, carbs, and fat macros.

One Rep Max Calculator

Estimate your one-rep max from weight and reps.

Ovulation Period Calculator

Estimate fertile window and next period from cycle data.

Running Pace Calculator

Solve running pace, time, or distance.

Sleep Calculator

Find ideal bedtime or wake times based on 90-minute sleep cycles.

Water Intake Calculator

Estimate your daily hydration target from weight and activity.

Image Tools

21 free tools ready to use

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Add Text to Image

Overlay captions and text on images and download.

Background Remover

Remove image backgrounds and export transparent PNG files.

Base64 Image Encoder/Decoder

Encode images to Base64 data URLs or decode back to pictures.

Blur Image

Blur images with an adjustable radius in your browser.

BMP Converter

Convert images to and from BMP format.

Circle Crop

Crop any image into a transparent circular PNG.

EXIF Viewer Remover

View image metadata and download a clean copy without EXIF.

HEIC to JPG Converter

Convert iPhone HEIC photos to standard JPG files instantly.

ICO Converter

Convert images into .ico icon files.

Image Compressor

Shrink image file size with adjustable quality — JPG output.

Image Cropper

Crop images to exact dimensions with a visual drag-and-select tool.

Image Resizer

Resize images to exact pixel dimensions with aspect ratio lock.

Image to Text (OCR)

Extract readable text from images using OCR — copy or export.

JPG to PNG

Convert JPG/JPEG images to PNG with lossless quality.

Meme Generator

Add classic top and bottom caption text to any image.

Pixelate Image

Pixelate or censor images with an adjustable block size.

PNG to JPG

Convert PNG images to JPG with adjustable compression quality.

Rotate Flip Image

Rotate and flip images in your browser and download PNG.

Sticker Remover

Paint over face stickers, emoji overlays, or logos and rebuild a clean photo at full quality — private, in your browser.

Watermark Image

Add a text watermark to images with opacity control.

WebP Converter

Convert images to WebP or export WebP files to PNG/JPG.

Kids Learning Tools

14 free tools ready to use

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Interactive Periodic Table

Explore the periodic table of elements interactively.

Kids Addition & Subtraction

Practice addition and subtraction with friendly multiple-choice math drills for young learners.

Kids Alphabet Trainer

Learn A–Z with big letter cards, example words, and a find-the-letter quiz.

Kids Chemistry Basics Quiz

Kid-friendly chemistry quiz on states of matter, water, air, and everyday science — pairs with the periodic table.

Kids Division Trainer

Learn division with simple whole-number problems, hints, and a score-based quiz mode.

Kids Human Body Explorer

Learn human body parts with labeled cards and a matching quiz — great for biology basics.

Kids Memory Match Game

Flip-and-match memory game with emoji pairs — great for kids and brain training.

Kids Number Trainer

Count from 1 to 100 with dot visuals, number names, and interactive quizzes.

Kids Physics Basics Quiz

Fun physics quiz for kids: gravity, light, sound, force, and motion with instant feedback.

Kids Shapes & Colors

Learn shapes and colors with flash cards and a matching quiz for young learners.

Kids Solar System Explorer

Explore the planets with fun facts, colorful cards, and a solar system quiz for kids.

Kids Spelling Trainer

Practice English spelling with picture words, hear pronunciations, and pick the correct spelling.

Kids Urdu Alphabet Trainer

Learn Urdu huruf e tahajji with big letter cards, roman names, and a find-the-letter quiz.

Multiplication Tables

Practice multiplication tables interactively.

PDF Tools

31 free tools ready to use

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Add Page Numbers to PDF

Stamp page numbers on every page of your PDF document.

Compress PDF

Reduce PDF file size while keeping quality — runs in your browser.

Crop PDF

Crop PDF page margins with adjustable crop boxes.

CSV to Excel

Convert CSV files into clean Excel (.xlsx) workbooks instantly — free, no signup.

Excel to CSV

Export any Excel sheet to CSV online. Free browser tool — files never upload.

Excel to PDF

Convert spreadsheet tables to a printable PDF in your browser.

Excel to Word

Convert Excel tables into a Word (.docx) document online — free browser converter.

HTML to PDF

Turn HTML or a pasted page into a downloadable PDF.

Images to PDF (Advanced)

Build a PDF from images with drag-and-drop page reordering.

Merge Excel Files

Combine multiple Excel workbooks into one file. Match sheets or stack rows — free online.

Merge PDF

Combine multiple PDF files into one document in your chosen order.

Organize PDF Pages

Reorder or delete PDF pages with a simple page list.

PDF Link Editor

Add clickable hyperlinks to any page of a PDF, then scan and validate every link already inside the file.

PDF Page Extractor

Extract specific pages from a PDF and download as a new file.

PDF Scanner

Scan documents with your camera or upload photos, then create a multi-page PDF in your browser.

PDF to Excel

Extract PDF tables and text into an editable Excel (.xlsx) spreadsheet in your browser.

PDF to Images Downloader

Convert each PDF page to PNG or JPEG and download as a ZIP.

PDF to Text

Extract all readable text from a PDF and copy or download as .txt.

PDF to Word

Extract PDF text and download as an editable Word-compatible document.

PowerPoint to PDF

Convert PowerPoint slides to PDF using your browser print pipeline.

Protect Excel

Add sheet protection to Excel files online so cells can’t be edited casually.

Protect PDF

Add a password to encrypt your PDF in the browser.

Protect Word

Add editing protection to Word (.docx) documents online — free, no signup.

Rotate PDF

Rotate all pages in a PDF by 90°, 180°, or 270°.

Split Excel

Split an Excel workbook into separate files by sheet. Free online Excel splitter.

Split PDF

Split a PDF into separate files — one per page or custom ranges.

Unlock Excel

Remove Excel sheet and workbook editing protection from .xlsx files in your browser.

Unlock PDF

Remove a PDF password when you already know it — private and local.

Unlock Word

Remove Word document editing restrictions from .docx files in your browser.

Watermark PDF

Add a text watermark across every page of your PDF document.

Word to PDF

Turn plain text or pasted content into a downloadable PDF instantly.

Security Tools

7 free tools ready to use

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AES Encrypt Decrypt

Encrypt and decrypt text with AES-GCM in your browser.

Hash Generator

Compute SHA-256, SHA-1, and other hashes from any text input.

HMAC Generator

Compute HMAC-SHA256 signatures locally.

Password Generator

Create strong random passwords with custom length and character sets.

Password Strength Checker

Check password strength locally — nothing is uploaded.

Random String PIN Generator

Generate random strings, passwords, and PINs locally.

TOTP 2FA Generator

Generate TOTP 2FA codes from a Base32 secret in your browser.

SEO Tools

8 free tools ready to use

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Keyword Density Checker

Analyze keyword density and top word frequency in any text.

Meta Tag Analyzer

Audit title, description, canonical, and social meta tags from HTML.

Open Graph Twitter Card Checker

Check Open Graph and Twitter Card tags from pasted HTML.

Readability Checker

Score text with Flesch Reading Ease and grade-level estimates.

Robots.txt Generator

Generate a robots.txt file with common crawl rules.

Schema Markup Generator

Build JSON-LD structured data for Article, FAQ, Product, and more.

SERP Snippet Preview

Preview how your page may look in Google search results.

XML Sitemap Generator

Build a downloadable sitemap.xml from a list of URLs.

Text Tools

19 free tools ready to use

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Binary Hex ASCII Converter

Convert text between binary, hex, and ASCII codes.

Bold Italic Unicode Text

Convert text to bold and italic Unicode styles for social posts.

Case Converter

Switch text between uppercase, lowercase, title, camel, and snake case.

Character Counter

Count characters, letters, spaces, and words instantly in your browser.

Fancy Text Generator

Generate stylish Unicode fonts for social bios, captions, and posts.

Find and Replace

Find text and replace all matches instantly — case options included.

Grammar Checker

Find basic grammar, spacing, and punctuation issues in your text.

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences, or words for mockups.

Morse Code Translator

Translate text to Morse code and back instantly.

Online Notepad

Autosaving scratchpad notepad in your browser with download.

Remove Duplicate Lines

Remove duplicate lines from lists, logs, or pasted text.

Remove Line Breaks

Remove line breaks and trim extra whitespace from pasted text.

Reverse Text

Reverse characters or words instantly in your browser.

ROT13 Caesar Cipher

Encode and decode text with ROT13 or a Caesar shift.

Sort Lines

Sort lines A–Z or Z–A, with optional unique-only and case options.

Text Diff Checker

Compare two text blocks side-by-side and highlight differences.

Text Repeater

Repeat any string N times with an optional separator.

Text to Slug

Convert titles into clean URL-friendly slugs for blogs and SEO.

Word Counter

Count words, characters, sentences, and estimated reading time.

Utility Tools

19 free tools ready to use

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Cookie Extractor

Copy login cookies from Facebook, Instagram, TikTok, and more with a one-click bookmark — for private video downloaders.

Cooking Measurement Converter

Convert cooking units like cups, tsp, ml, and ounces.

Countdown to Date

Live countdown to any future date or event.

Data Storage Converter

Convert between B, KB, MB, GB, TB, and PB.

Dice Roller Coin Flip

Roll dice or flip a coin instantly.

Invoice Generator

Create professional invoices with your logo, line items, tax, CEO signature, and download PDF or Excel templates.

Laptop to iPhone File Transfer

Share files between laptop and iPhone via a temporary room link.

My WiFi Device & Camera Finder

Find devices on your own Wi‑Fi and manage multiple cameras on one wall with your passwords, RTSP links, and snapshots.

Number to Words Converter

Convert numbers into English words.

Random Number Generator

Generate random numbers within any range.

Roman Numeral Converter

Convert numbers to Roman numerals and back.

Spinner Wheel Name Picker

Spin a wheel to pick a random name from your list.

Temperature Converter

Convert Celsius, Fahrenheit, Kelvin, and Rankine with formulas, reference points, and temperature guidance.

Timer and Stopwatch

Countdown timer and stopwatch that run in your browser tab.

To Do List

Simple private to-do list saved in your browser.

Unit Converter

Convert length, weight, temperature, and more in one tool.

Weather Forecast

Check current weather, hourly conditions, and a seven-day forecast for locations worldwide.

World Country Time & Compare

Live country times worldwide — select multiple countries and compare hour differences instantly.

ZIP Unzip Files

Create ZIP archives or extract ZIP files in your browser.

Video Tools

7 free tools ready to use

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GIF to Video

Convert an animated GIF into a WebM video in your browser.

Mute Video

Remove the audio track from a video and download the muted file.

Rotate Video

Rotate a video 90°, 180°, or 270° and download the result.

Text Voice Video Maker

Turn typed text or uploaded audio into an animated reading video with natural voices, then download in 480p, 720p, or 1080p.

Video to GIF

Convert video clips to animated GIFs with custom duration and FPS.

Video to MP3

Extract audio from a video file as WAV or WebM/Opus in your browser.

Video Trimmer

Cut and trim video clips in your browser.

Writing & Career

5 free tools ready to use

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Email Extractor

Extract email addresses from any pasted text.

Email Signature Generator

Create a professional HTML email signature.

Headline Analyzer

Score blog and marketing headlines with actionable tips.

Resume CV Builder

Build a clean resume and print or download it.

Word Frequency Counter

Count how often each word appears in your text.

Frequently asked questions

Quick answers about using ToolSphere and how our free online tools work.

Is ToolSphere really free?

Yes. Every tool on ToolSphere is free to use with no account, subscription, or hidden fees.

Do I need to sign up to use the tools?

No. Open any tool and start working immediately — no email or registration required.

Are my files uploaded to your servers?

Most tools run entirely in your browser. Your files stay on your device unless a specific tool clearly states otherwise.

What types of tools does ToolSphere offer?

ToolSphere includes PDF converters, image editors, text utilities, developer tools, design helpers, security tools, video tools, public social downloaders, private social downloaders, and everyday utilities — each in its own category.

Can I use ToolSphere on mobile?

Yes. ToolSphere is responsive and works on desktop, tablet, and mobile browsers.

Start using ToolSphere today

All Tools. One Sphere. Endless Possibilities.

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