255+ Free Browser-Based Tools
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Popular Tools
Most usedWord Counter
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Image Compressor
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JSON Formatter
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Base64 Encoder
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Case Converter
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Hash Generator
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URL Encoder
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UUID Generator
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Keyword Density
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Free Word Counter Online
Count words, characters, sentences and reading time instantly.
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Text Case Converter
Convert text between UPPER, lower, Title and other cases.
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Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences or words for mockups.
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Text Diff Checker
Compare two texts side by side and highlight every change.
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Duplicate Line Remover
Instantly strip duplicate or blank lines from any block of text.
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Text Reverser
Flip any text backwards — character by character or word by word.
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Text Sorter
Sort lines alphabetically, by length, numerically or randomly.
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Find & Replace
Find and replace text across any block, with regex support.
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Word Frequency Counter
See a ranked table of how often each word appears in your text.
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Markdown to HTML Converter
Convert Markdown to clean HTML with a live rendered preview.
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SVG to PNG Converter
Convert SVG vector images to PNG raster format instantly.
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Image Compressor
Reduce JPG & PNG file size in your browser. No uploads.
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QR Code Generator
Create QR codes for URLs, text or contact details.
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Image Resizer
Resize images to exact dimensions or by percentage in-browser.
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Image Color Picker
Click any pixel in an image to get its HEX, RGB and HSL colour values.
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JPG to PNG Converter
Convert JPG / JPEG images to lossless PNG format entirely in your browser.
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PNG to JPG Converter
Convert PNG images to compressed JPG with adjustable quality. No uploads.
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WebP to PNG Converter
Decode WebP images and save them as PNG files — works fully offline.
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PNG to WebP Converter
Convert PNG images to smaller WebP format for faster web pages.
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JPG to WebP Converter
Turn JPG photos into efficient WebP files without any server upload.
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JSON Formatter & Validator
Beautify, validate and minify JSON quickly and easily.
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URL Encoder / Decoder
Encode or decode URL components for safe transmission.
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Regex Tester
Test regular expressions with live match highlighting.
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UUID Generator
Generate cryptographically random UUID v4 strings in bulk.
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Base64 Encoder / Decoder
Encode or decode Base64 strings instantly in your browser.
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HTML Encoder / Decoder
Encode special characters as HTML entities or decode them back.
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HTML Minifier
Minify HTML to remove whitespace and reduce file size.
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CSS Minifier
Minify CSS to remove whitespace and reduce file size.
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JavaScript Minifier
Minify JavaScript to reduce file size and improve page performance.
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JSON to CSV Converter
Convert JSON arrays to CSV format instantly in your browser.
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Password Generator
Generate strong, random and secure passwords in one click.
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Password Strength Checker
Test how strong your password is — scores length, complexity and entropy.
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Bcrypt Hash Generator
Hash and verify passwords with bcrypt. Runs entirely in your browser.
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Random Token Generator
Generate cryptographically secure random tokens in hex, base64 or alphanumeric.
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File Checksum Verifier
Calculate and verify MD5, SHA-1, SHA-256 and SHA-512 checksums for any file.
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HMAC Generator
Generate HMAC signatures using SHA-256, SHA-512 and other algorithms.
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TOTP / 2FA Code Generator
Generate and verify TOTP / 2FA codes compatible with Google Authenticator.
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RSA Key Pair Generator
Generate RSA public/private key pairs in PEM format in your browser.
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SSL Certificate Decoder
Paste a PEM certificate and inspect its subject, issuer, expiry and SANs.
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JWT Generator & Signer
Create and sign JSON Web Tokens with HS256/RS256 and custom claims.
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Meta Tag Generator
Generate SEO meta tags — title, description, canonical and robots — instantly.
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Open Graph Tag Generator
Create OG and Twitter Card tags for perfect social media link previews.
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Robots.txt Generator
Build a robots.txt file with crawl rules and sitemap URL in seconds.
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Sitemap Generator
Generate an XML sitemap for any website instantly.
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Keyword Density Checker
Analyse keyword density in your text for SEO optimisation.
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Slug Generator
Create clean, SEO-friendly URL slugs from any title or phrase.
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SERP Preview Tool
Preview how your page title and meta description look in Google search results.
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Schema Markup Generator
Generate JSON-LD structured data for articles, products, FAQs and more.
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UTM Parameter Builder
Build UTM-tagged campaign URLs for Google Analytics tracking.
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Hreflang Tag Generator
Generate hreflang tags for multilingual and multi-regional SEO.
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Unit Converter
Convert length, weight, temperature, speed and area units instantly.
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Age Calculator
Calculate exact age in years, months and days from any birth date.
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Time Zone Converter
Convert times between any two time zones with full daylight saving support.
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Date Calculator
Add or subtract days, weeks and months from any date.
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Roman Numeral Converter
Convert between Arabic numbers and Roman numerals instantly.
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Number to Words Converter
Convert any number to its written English form instantly.
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Color Converter
Convert colors between HEX, RGB, HSL and CMYK instantly.
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File Size Converter
Convert between bytes, KB, MB, GB and TB instantly.
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Fraction to Decimal Converter
Convert fractions to decimals and decimals back to fractions instantly.
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Currency Converter
Convert between world currencies using up-to-date exchange rates.
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BMI Calculator
Calculate Body Mass Index from height and weight with health range indicators.
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Tip Calculator
Calculate tip amounts and split the bill between any number of people.
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Discount Calculator
Find the final price after any percentage or fixed discount instantly.
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Percentage Calculator
Calculate percentages, percentage change and percentage of totals instantly.
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Scientific Calculator
Full-featured scientific calculator with trig, logarithm and power functions.
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Loan / EMI Calculator
Calculate monthly EMI, total interest and full repayment schedule for any loan.
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Compound Interest Calculator
Calculate compound interest with monthly, quarterly or annual compounding.
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Tax Calculator
Calculate tax amount and total price for any rate and base value.
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GCD & LCM Calculator
Find the Greatest Common Divisor and Least Common Multiple of any numbers.
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Prime Number Checker
Check if a number is prime and list prime factors instantly.
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IP Address Info
Look up geolocation, ISP and hostname details for any IP address.
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DNS Lookup
Query A, AAAA, MX, TXT, CNAME and NS records for any domain.
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URL Parser & Analyzer
Break any URL into protocol, host, path, query params and fragment.
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HTTP Header Viewer
Inspect the HTTP response headers returned by any public URL.
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WHOIS Lookup
Look up domain registration, registrar and expiry information for any domain.
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SSL Certificate Checker
Check the SSL certificate validity, issuer and expiry for any domain.
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Ping Tool
Measure round-trip response time to any public host from the browser.
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Port Scanner
Check whether common ports are open or closed on any public host.
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Countdown Timer
Set a countdown to any future date and time with a live real-time display.
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Stopwatch
Precise browser-based stopwatch with lap recording and split times.
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Days Until Calculator
Find exactly how many days, hours and minutes until any future date.
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World Clock
See the current time in multiple cities and time zones simultaneously.
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Week Number Calculator
Find the ISO week number for any date and look up any week's dates.
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Time Duration Calculator
Calculate duration between two times and add or subtract time intervals.
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Zodiac Sign Calculator
Find your Western zodiac sign and personality traits from any birth date.
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Chinese Zodiac Calculator
Find your Chinese zodiac animal and element from any birth year.
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Sunrise & Sunset Calculator
Get accurate sunrise and sunset times for any location and date.
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Moon Phase Calculator
Find the lunar phase for any date with a visual moon diagram.
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Color Mixer
Mix two colors together and preview the blended HEX and RGB result.
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Tint & Shade Generator
Generate a full range of lighter tints and darker shades from any base color.
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Color Scheme Generator
Create complementary, triadic and analogous color schemes from any base color.
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Color Name Finder
Find the nearest named CSS color for any HEX or RGB value.
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CSS Variables Generator
Generate a complete CSS custom properties color theme from any palette.
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Gradient Palette Generator
Create multi-stop color gradients with live preview and full CSS export.
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Border Radius Generator
Generate CSS border-radius values visually for any rounded shape.
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Typography Scale Generator
Generate a modular type scale in rem/px and export the CSS variables.
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Glassmorphism Generator
Create frosted-glass UI effects with backdrop-filter and copy the CSS instantly.
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Neumorphism Generator
Design soft-UI neumorphic card and button effects and copy the CSS.
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Random Number Generator
Generate one or many random numbers within any custom min/max range.
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Dice Roller
Roll any combination of dice — D4, D6, D8, D10, D12, D20 — with history log.
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Coin Flipper
Flip a virtual coin and track heads/tails results and streaks over time.
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Random Color Generator
Generate random HEX, RGB or HSL colors with one click or in bulk.
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Random Name Picker
Paste a list of names and draw a random winner with animated selection.
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List Randomizer & Shuffler
Randomly shuffle and reorder any list of items in one click.
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Wheel of Fortune Spinner
Add custom options to a spinning wheel and pick a random result.
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Magic 8-Ball
Type any yes/no question and get a classic Magic 8-Ball style answer.
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CSV Editor & Viewer
View, edit, sort and filter CSV files in a clean spreadsheet-like interface.
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CSV Merger
Merge multiple CSV files into one, aligning columns automatically by header name.
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CSV Column Extractor
Pick and extract specific columns from a CSV file and download the result.
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JSON Table Viewer
Display any JSON array as a searchable, sortable and filterable HTML table.
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Data Deduplicator
Remove duplicate rows from CSV or plain-text data by any selected column.
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SQL to JSON Converter
Convert SQL INSERT statements to a clean JSON array instantly.
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JSON to SQL Converter
Convert a JSON array into SQL INSERT statements for any table instantly.
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TSV to CSV Converter
Convert tab-separated values (TSV) to standard comma-separated CSV format.
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CSV to TSV Converter
Convert comma-separated CSV files to tab-separated TSV format instantly.
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Excel to JSON Converter
Convert Excel (.xlsx) spreadsheet data to a JSON array in your browser.
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PDF Merger
Combine multiple PDF files into one document in your browser. No uploads.
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PDF Splitter
Split a PDF into individual pages or custom page ranges instantly.
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PDF Compressor
Reduce PDF file size while preserving quality. No server uploads needed.
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PDF to JPG Converter
Convert each page of a PDF to a JPG image in your browser.
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PDF Page Remover
Delete specific pages from a PDF file directly in your browser.
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PDF Rotator
Rotate individual or all pages in a PDF document and save instantly.
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PDF Password Remover
Remove the password from an already-unlocked PDF in your browser.
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PDF Watermark Tool
Add custom text or image watermarks to every page of a PDF.
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PDF to Text Extractor
Extract all readable text content from a PDF document instantly.
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PDF Metadata Editor
View and edit the title, author, subject and other metadata of any PDF.
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Why Toolsbox4u
Built different, on purpose
Every design decision was made to get out of your way and just work.
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Everything runs in your browser. Your files and text never leave your device — ever.
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No page reloads, no round-trips. Output appears the moment you type or paste.
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Always Free
No hidden plans, no limits, no paywalls. Every tool on this site is free forever.
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Open any tool and start immediately. No account, no email, no pop-ups — ever.
About Toolsbox4u
The tools you actually need,
right in your browser
Toolsbox4u is a free collection of browser-based utilities for writers, developers, designers, and anyone handling everyday digital tasks. From counting words and formatting JSON to compressing images and generating secure passwords — everything runs directly in your browser without uploading files to a server.
Every tool is free, requires no account, and keeps your data private. Most tools are fully client-side, meaning your content never leaves your device.