Free Online Tools
Fast, free, and no signup required. All tools run in your browser — your data never leaves your device.
Developer Tools
PDF tools, JSON formatters, encoders, and developer utilities
JSON Formatter Online — Format & Validate JSON Free
Format and validate JSON online for free. Paste messy JSON and get clean, indented output instantly. No signup, runs in your browser.
Base64 Encoder & Decoder Online — Free Tool
Encode text to Base64 or decode Base64 back to text. Free online tool runs entirely in your browser. No upload, no signup. Instant results.
URL Encoder & Decoder Online — Free Percent Encoding
Encode or decode URLs with percent-encoding. Free online tool handles query strings, special characters, and Unicode instantly. No signup required.
HTML Entities Encoder & Decoder Online — Free
Encode special characters to HTML entities or decode them back. Free online tool for web developers. No signup, instant results, runs in browser.
Regex Tester Online — Test Regular Expressions
Test regular expressions online with real-time matching. Free regex tester supports flags, groups, and common patterns. No signup.
Text Diff Checker — Compare Text Online
Compare two texts side by side online for free. See additions and deletions highlighted instantly. No signup, runs in your browser.
Unix Timestamp Converter Online — Free Epoch Converter
Convert Unix timestamps to human-readable dates and vice versa. Free online timestamp converter. Supports seconds and milliseconds. No signup required.
JWT Decoder Online — Decode JSON Web Tokens
Decode JWT headers and payloads online for free. Inspect JSON Web Tokens in your browser, no upload. Instant decoding, no signup.
UUID Generator Online — Generate UUID v4 in Bulk Free
Generate random UUID v4 values online for free. Bulk generation, multiple formats (hyphenated, compact, uppercase). No signup, instant results.
Cron Expression Parser Online — Free Cron Translator
Parse cron expressions into human-readable schedules online for free. See next execution times and field descriptions. No signup, instant parsing.
Number Base Converter — Binary, Hex, Decimal
Convert numbers between binary, octal, decimal, and hexadecimal online for free. Instant conversion, no signup required.
JSON to CSV Converter Online — Free JSON Conversion
Convert JSON arrays to CSV format online for free. Flatten nested structures, choose delimiters, export tabular data. No signup, instant conversion.
Image to Base64 Converter Online — Free Data URI Tool
Convert images to Base64 data URIs online for free. Generate CSS background-image and HTML img src code. No upload, runs in your browser, no signup.
IP Address Lookup — Find Your IP Online
Look up your public IP address and geolocation online for free. See ISP, country, city. No signup, instant results.
CSV Viewer Online — View CSV Data Free
View and analyze CSV data in an interactive table online for free. Sort, filter, search. No signup, runs in your browser.
Binary Translator — Text to Binary Online
Convert text to binary or binary to text online for free. Supports ASCII and UTF-8. Instant translation, no signup required.
Text to Hex Converter Online — Free Hex Encoder
Convert text to hexadecimal and back online for free. Multiple output formats: spaced, prefixed, continuous. Instant conversion, no signup required.
JSON to YAML Converter Online — Free Bidirectional
Convert JSON to YAML and YAML to JSON online for free. Handles nested structures and arrays. Instant conversion, no signup required. For configs.
Markdown to HTML Converter Online — Free MD to HTML
Convert Markdown to clean HTML online for free. Supports GFM, tables, code blocks, links. Instant conversion, no signup required. For blogs and docs.
Screen Resolution Detector — Check Display
Detect your screen resolution, viewport, pixel ratio, and color depth online for free. No signup, instant detection.
PDF Merge & Split Online — Combine or Split PDFs Free
Merge multiple PDFs into one or split a PDF into separate pages. Free online tool runs in your browser. No upload, no signup, fully private.
Image to PDF Converter Online — Free JPG to PDF Tool
Convert JPG, PNG, and WebP images to PDF online for free. Combine multiple images into one PDF. Runs in your browser, no upload, no signup.
Designer Tools
Image compressors, format converters, color pickers, and visual utilities
Color Converter — HEX, RGB, HSL, CMYK
Convert colors between HEX, RGB, HSL, and CMYK formats. Free online color converter with visual picker. Instant conversion, no signup.
Lorem Ipsum Generator Online — Free Placeholder Text
Generate Lorem Ipsum placeholder text online for free. Choose paragraphs, sentences, or words. Instant copy, no signup required. For mockups and designs.
Black & White Image Converter Online
Convert color photos to black and white online for free. Four grayscale methods: luminance, average, lightness, custom. No upload.
CSS Gradient Generator Online — Linear & Radial Free
Create CSS gradients visually online for free. Linear, radial, conic gradients with multiple stops. Copy CSS instantly, no signup required.
Image Resizer Online — Resize Images Free
Resize images online for free. Set custom width and height, maintain aspect ratio. Supports JPG, PNG, WebP. No upload, no signup.
CSS Box Shadow Generator Online — Free Visual Tool
Create CSS box shadows visually online for free. Adjust offset, blur, spread, color, opacity. Live preview and copy CSS. No signup required.
CSS Border Radius Generator Online — Free Visual Tool
Generate CSS border-radius visually online for free. Control each corner individually, create circles and ellipses. Copy CSS. No signup required.
Placeholder Image Generator Online — Free Mockup Images
Generate placeholder images for mockups online for free. Custom dimensions, colors, text. Download PNG instantly. No signup required. For designers.
PX to REM Converter Online — CSS Units
Convert px to rem and rem to px online for free. Configurable root font size. Instant conversion, no signup required.
Image Compressor Online — Reduce Image File Size Free
Compress JPG, PNG, and WebP images online for free. Batch compress multiple images at once. Runs in your browser, no upload, no signup.
Image Format Converter — PNG, JPG, WebP Online Free
Convert images between PNG, JPG, WebP, and AVIF online for free. Batch convert multiple images instantly. Runs in your browser, no upload required.
Security Tools
Password generators and security utilities
Hash Generator — MD5, SHA-1, SHA-256 Online
Generate MD5, SHA-1, and SHA-256 hashes from any text. Free online hash generator for checksums and data integrity. Instant results.
Secure Password Generator Online — Create Strong Passwords
Generate strong, random passwords online for free. Customize length, symbols, numbers, uppercase. Instant generation, runs in your browser. No signup.
Text Tools
Count, analyze, and transform text
Word Counter Online — Count Words & Characters
Count words, characters, sentences, and paragraphs online for free. Real-time counting for writers, students, and SEO. No signup.
Text Case Converter Online — Uppercase, camelCase, snake_case
Convert text to uppercase, lowercase, title case, camelCase, snake_case, kebab-case online. Free instant conversion, no signup. For coders and writers.
Remove Duplicate Lines Online — Free Text Dedup Tool
Remove duplicate lines from text online for free. Preserve order or sort results. Instant cleanup for lists, logs, and pasted data. No signup required.
URL Slug Generator Online — SEO-Friendly Slugs Free
Convert titles to URL-friendly slugs online for free. Lowercase, hyphenated, SEO-optimized slugs. Instant generation, no signup. For blogs and docs.
Markdown Previewer Online — Live Preview
Write Markdown and see live HTML preview online for free. Supports GFM, code blocks, tables. No signup, runs in your browser.
Text Reverser Online — Reverse Text Free
Reverse text by characters, words, or lines online for free. Handles Unicode and emoji. Instant reversal, no signup required.
Whitespace Remover Online — Free Text Cleaner Tool
Remove extra whitespace from text online for free. Trim, collapse spaces, remove blank lines and tabs. Instant cleanup, no signup required.
Sort Lines Online — Alphabetical & More
Sort text lines alphabetically, by length, numerically, or randomly online for free. Remove duplicates. No signup required.
Line Number Adder Online — Free Text Numbering Tool
Add line numbers to text online for free. Choose starting number, separator, and format. Instant formatting, no signup. For code and logs.
Punctuation Remover Online — Free Text Cleaner Tool
Remove punctuation from text online for free. Strip periods, commas, quotes, dashes, brackets. Instant cleanup, no signup. For NLP and analysis.
Find and Replace Text Online — Free with Regex Support
Find and replace text online for free. Supports regex, case-sensitive, whole word matching. Live preview, no signup required. For bulk editing.
Text to Speech Online — Free TTS Voice Generator
Convert text to speech online for free. Multiple voices, adjustable speed and pitch. No signup, runs in your browser. For proofreading and learning.
Everyday Tools
QR codes, unit conversions, calculators, and daily utilities
Unit Converter Online — Length, Weight, Temp
Convert length, weight, temperature, speed, and data units online for free. Fast, accurate, instant conversion. No signup needed.
QR Code Generator Online — Free QR Codes for URLs & WiFi
Generate QR codes for URLs, text, email, WiFi online for free. Download as PNG or SVG. Instant creation, no signup required. Works in your browser.
Schulte Grid — Attention Training Game
Train focus and peripheral vision with the Schulte Grid. Click numbers 1-25 in order as fast as possible. Free online, no signup.
Date Difference Calculator Online — Days Between Dates
Calculate days, weeks, months, and years between two dates online for free. Instant date difference, no signup. Handles leap years automatically.
Age Calculator Online — Exact Age in Years, Months, Days
Calculate exact age in years, months, and days online for free. See total days lived and next birthday. Instant results, no signup required.
BMI Calculator Online — Body Mass Index
Calculate Body Mass Index (BMI) online for free. See BMI category and healthy weight range. Instant, no signup required.
Percentage Calculator Online — Free Percent Calculator
Calculate percentages, percentage change, and percentage of a number online for free. Instant results with formulas shown. No signup required.
Tip Calculator Online — Split Bills Free
Calculate tip and split bills online for free. Pre-set percentages, custom amounts, group splitting. No signup required.
Compound Interest Calculator Online
Calculate compound interest on investments online for free. Monthly contributions, multiple compounding frequencies. No signup.
Loan Calculator Online — Mortgage & Auto
Calculate monthly loan payments online for free. Mortgage, auto, personal loans. See total interest. No signup required.
GPA Calculator Online — 4.0 Scale Grade Point Average
Calculate your Grade Point Average (GPA) on a 4.0 scale online for free. Supports plus/minus grades and credit hours. No signup required.
Discount Calculator Online — Sale Price
Calculate sale prices after discounts online for free. Enter price and discount percentage. Instant savings, no signup.
Fuel Cost Calculator — Trip Gas Cost
Calculate fuel cost for trips online for free. Enter distance, MPG, gas price. Supports metric units. No signup required.
Speed Converter — mph, km/h, knots Online
Convert speed between mph, km/h, m/s, knots, and ft/s online for free. Instant conversion, no signup required.
Countdown Timer Online — Count Down
Count down to any future date online for free. See days, hours, minutes, seconds remaining. No signup required.
Why Use Browser-Based Online Tools?
Traditional online tools require you to upload your data to a server, process it remotely, and send the results back. This introduces privacy risks, latency, and often costs. FreeToolJet takes a different approach: every tool runs entirely in your browser using JavaScript. Your data stays on your device, processing is instant, and the tools are free to run because there are no server costs to cover.
Whether you need to format JSON for an API response, generate a secure password for a new account, decode a JWT token to debug authentication, or convert a color between HEX and RGB for a design project, these tools work the same way: paste your input, get your output, move on with your work. No account, no upload, no tracking.
Learn More in Our Blog
Detailed guides on JSON, passwords, QR codes, regex, and more.