All tools
Every tool runs entirely in your browser — fast, private and free.
Developer Tools
JSON Formatter
Format, validate and beautify JSON online. Free JSON formatter with indentation options and key sorting — runs entirely in your browser.
Base64 Encode/Decode
Encode text to Base64 or decode Base64 to text instantly. Free online Base64 converter — no upload, everything stays in your browser.
URL Encode/Decode
Encode or decode URLs and query strings online. Free URL encoder/decoder for percent-encoding special characters.
Password Generator
Generate strong, random passwords with custom length, uppercase, numbers and symbols. Secure client-side generation — nothing leaves your device.
Hash Generator
Generate SHA-256, SHA-384, SHA-512 and SHA-1 hashes from text using the Web Crypto API. Fast, free and fully client-side.
Regex Tester
Test regular expressions against sample text with live match highlighting, flags and capture groups. Free online regex tester.
JWT Decoder
Decode JWT tokens online — view the header, payload and expiry instantly. Fully client-side, your token never leaves the browser.
CSS Minifier & Beautifier
Minify CSS to shrink file size or beautify it into readable, indented code. Free online CSS formatter — instant and client-side.
HTML Entity Encoder
Encode special characters as HTML entities or decode entities back to text. Handles named, decimal and hex entities.
SQL Formatter
Format SQL queries with uppercase keywords and clean clause indentation. Free online SQL beautifier — runs in your browser.
YAML Formatter
Format and validate YAML, or convert between YAML and JSON. Free online YAML formatter for configs, pipelines and Kubernetes files.
Binary/Hex/Decimal Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly — with support for huge integers and 0x/0b prefixes.
Cron Expression Generator
Build and understand cron expressions with instant plain-English descriptions and common presets. Free cron schedule generator.
Regex Generator
Get battle-tested regular expressions for emails, URLs, IPs, dates, passwords and more — with flags and anchoring options, ready to copy.
UUID Generator
Generate cryptographically random version 4 UUIDs — one or a thousand at a time, with uppercase and no-dash options. Free and instant.
Timestamp Converter
Convert Unix timestamps to human-readable dates and back — auto-detects seconds vs milliseconds and shows local, UTC, ISO and relative time.
Text & String Tools
Word Counter
Count words, characters, sentences and paragraphs in real time. Free online word counter for essays, tweets and SEO content.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case and more. Instant, free case conversion.
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text by words, sentences or paragraphs for mockups and designs. Free and instant.
Text Diff
Compare two texts and highlight the differences line by line. Free online diff checker — runs entirely in your browser.
CSV to JSON
Convert CSV data to JSON online with header detection, custom delimiters and quoted-field support. Fast, free and private.
JSON to CSV
Convert a JSON array to CSV with automatic column detection and proper quoting. Free online JSON to CSV converter.
Markdown Preview
Write Markdown and see the rendered result live — headings, lists, links, code blocks and more. Free online Markdown previewer.
HTML to Markdown
Convert HTML to clean Markdown — headings, lists, links, images and code blocks. Free client-side HTML to Markdown converter.
Text to Slug
Turn any title into a clean, SEO-friendly URL slug — lowercase, hyphenated and free of accents or special characters.
Plagiarism Checker (Text Compare)
Compare two texts for duplicate content — get an overall similarity score and a list of near-identical sentences. Private, client-side checking.
Math & Calculators
Basic Calculator
Free online calculator for quick everyday arithmetic — addition, subtraction, multiplication, division and percentages.
Percentage Calculator
Calculate percentages, percentage change and percentage of a number instantly. Free online percentage calculator.
BMI Calculator
Calculate your Body Mass Index from height and weight in metric or imperial units, with healthy range guidance.
Age Calculator
Calculate exact age in years, months and days from a date of birth — plus total days lived and days until the next birthday.
Date Difference Calculator
Calculate the exact time between two dates in years, months, weeks and days. Free date duration calculator for deadlines, anniversaries and planning.
EMI/Loan Calculator
Calculate your monthly loan EMI, total interest and total repayment from the loan amount, interest rate and tenure. Free EMI calculator.
Compound Interest Calculator
Project investment growth with compound interest — set the rate, compounding frequency, duration and optional monthly contributions.
Calorie Calculator
Estimate your daily calorie needs (TDEE) from age, height, weight and activity level — with targets for weight loss, maintenance and gain.
Converters
Length Converter
Convert length units instantly — meters, feet, inches, kilometers, miles and more. Free online length unit converter.
Weight Converter
Convert weight and mass units — kilograms, pounds, ounces, grams, stones and tons. Free online weight converter.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly. Free online temperature converter.
Speed Converter
Convert speed units — km/h, mph, m/s, ft/s and knots. Free online speed converter for driving, running and sailing.
Currency Converter
Convert between 35+ world currencies with daily-updated exchange rates. Free currency converter — USD, EUR, GBP, INR, JPY and more.
Time Zone Converter
Convert any date and time between world time zones — perfect for scheduling meetings across New York, London, India and Tokyo.
File Size Converter
Convert file sizes between bits, bytes, KB, MB, GB, TB and their binary KiB/MiB/GiB equivalents. Understand why your 1 TB drive shows 931 GiB.
Image & Color Tools
QR Code Generator
Create QR codes for URLs, text and Wi-Fi instantly, then download as PNG. Free client-side QR code generator — no watermark.
Gradient Generator
Create beautiful CSS gradients — linear, radial or conic — with a live preview and copy-ready CSS code. Free online gradient generator.
Color Palette Generator
Generate harmonious 5-color palettes from any base color — analogous, complementary, triadic and more. Click any swatch to copy its hex code.
Image Resizer
Resize images to exact pixel dimensions and download as PNG, JPEG or WebP. Free image resizer that runs entirely in your browser — no upload.
Image to Base64
Convert any image to a Base64 string or data URL for embedding in HTML, CSS or JSON. Fully client-side — your image never leaves your device.
Favicon Generator
Create a favicon from text or an emoji and download every standard size — 16px to 512px, including Apple touch and Android icons.
Barcode Generator
Generate Code 128 barcodes from text or numbers and download as crisp SVG. Free client-side barcode maker — no watermark, no upload.
Image Compressor
Compress images to WebP or JPEG with adjustable quality and see the size savings instantly. 100% local — photos never leave your device.
Base64 to Image
Paste a Base64 string or data URL and instantly preview and download the image. Auto-detects PNG, JPEG, GIF, WebP, SVG and BMP.
Color Converter
Convert colors between HEX and RGB with a live picker and instant preview. Free online color converter for designers and developers.
Time & Productivity
Stopwatch
Free online stopwatch with lap times and millisecond precision. Start, pause and reset — no install, works in any browser.
Countdown Timer
Free online countdown timer — set hours, minutes and seconds and get an alert when time is up. Great for cooking, study and workouts.
World Clock
See the current time in cities around the world at a glance. Free online world clock with live seconds and UTC offsets.
Invoice Generator
Create a professional invoice in your browser — line items, tax, discount and totals — then print or save as PDF. Free, no signup, no watermark.