Free Developer Tools

Encrypt and decrypt text with AES-256 using a password

Generate and verify bcrypt password hashes with adjustable cost factor

Validate credit card numbers using the Luhn algorithm and detect card type

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly

Generate HMAC signatures with SHA-256, SHA-384, SHA-512, and MD5

Validate International Bank Account Numbers with country and structure info

Decode and inspect JWT tokens — header, payload, and expiry

Generate strong, cryptographically secure passwords instantly

Analyze password strength with entropy, crack time, and security feedback

Calculate exact age in years, months, days, and time until next birthday

Build cron expressions visually with presets and next-run preview

Calculate the difference between two dates in years, months, days, and more

Convert times between time zones with automatic DST handling

Convert Unix timestamps to dates and dates to Unix timestamps

Find the ISO week number for any date, and list weeks of the year

Calculate and simplify aspect ratios, resize dimensions, and use presets

Create CSS border-radius values with per-corner control and elliptical shapes

Create beautiful CSS box-shadows with multiple layers and live preview

Convert colors between HEX, RGB, and HSL formats instantly

Generate beautiful color palettes with harmony rules and export

Create glassmorphism (frosted glass) CSS effects with backdrop blur and transparency

Create linear, radial, and conic CSS gradients with live preview and code

Learn and experiment with CSS Flexbox properties interactively

Experiment with every CSS Grid property and copy the generated code

Remove image backgrounds instantly with AI — 100% in your browser

Decode Base64 strings back to images and download them

Generate all favicon sizes from any image — ICO, PNG, Apple touch, Android

Compress JPG, PNG, and WebP images in your browser — no upload

Crop images with drag-to-select, aspect ratio presets, and rotate

Convert images between PNG, JPG, WebP, BMP, and ICO formats

Resize images to any dimension, with presets for social media

Rotate and flip images by any angle with live preview

Convert images to Base64 data URLs or decode Base64 back to images

Add text or image watermarks to photos with custom position and opacity

Convert PNG and JPG images to vector SVG by tracing

Optimize and minify SVG files without losing quality

Convert SVG files to PNG, JPG, or WebP at any resolution

Generate Code 128, EAN-13, Code 39, and UPC-A barcodes as PNG

Browse, search, and copy emojis — with skin tone variants

Convert text to Morse code and Morse code back to text with audio playback

Generate QR codes for URLs, text, WiFi, email, and more — download PNG

Transcribe your voice to text in real time using your browser

Convert text to natural-sounding speech using your browser's built-in voices

Convert length, weight, temperature, area, volume, speed, and more

Convert titles and text into clean, SEO-friendly URL slugs

Encode text or data to Base32 and decode Base32 back to text

Encode text to Base64 or decode Base64 back to text instantly

Convert text to binary and binary back to text instantly

Encode and decode the Caesar cipher with any shift, plus brute-force all 25 shifts

Encode HTML special characters or decode HTML entities instantly

Convert Unicode domain names to Punycode (IDN) and back

Encode and decode Quoted-Printable text used in email (RFC 2045)

Encode and decode ROT13, ROT5, ROT18, ROT47, and custom rotations

Encode URLs or decode encoded URLs instantly in your browser

Parse and decode URL query strings into readable key-value pairs

Encode and decode messages with the Vigenère polyalphabetic cipher

Calculate Unix/Linux file permissions — octal, symbolic, and command

Parse Cookie and Set-Cookie headers with flags, expiry, and editing

Parse and explain cron schedules with next run times

Minify CSS to reduce size or beautify it back to readable format

Compare two texts and see differences side-by-side or unified

Validate docker-compose.yml files, check services, ports, and dependencies

Parse .env files into JSON, YAML, or shell variables — and back

Generate .gitignore files for any language, framework, or editor

Complete reference of HTTP status codes with meanings and use cases

Calculate IPv4 subnet masks, network ranges, and usable hosts

Minify JavaScript to reduce size or beautify it back to readable format

Look up MIME types by file extension or find extensions for a MIME type

Convert pixels to rem, em, and other CSS units instantly

Complete reference of well-known TCP/UDP ports with services and security notes

Test regular expressions live with match highlighting and capture groups

Parse, compare, and validate Semantic Versioning (semver) strings

Parse URLs into components, extract query parameters, and rebuild them

Parse browser User-Agent strings into browser, OS, device, and engine

View, edit, sort, and export CSV data in a spreadsheet-like table

Convert JSON to CSV and CSV to JSON instantly in your browser

Format, validate, and beautify JSON data instantly

Convert numbers between binary, octal, decimal, hexadecimal, and any base 2–36

Convert numbers to Roman numerals and Roman numerals to numbers

Convert TOML to JSON and JSON to TOML instantly in your browser

Generate random RFC 4122 version 4 UUIDs instantly

Format, beautify, minify, and validate XML documents

Convert YAML to JSON and JSON to YAML instantly in your browser

Find and replace text with regex support and capture group backreferences

Generate placeholder Lorem Ipsum text for designs and mockups

Write Markdown and preview rendered HTML live in your browser

Remove duplicate lines from any text — keep first, last, or unique

Sort lines alphabetically, numerically, or by length — A-Z or Z-A

Convert text to UPPERCASE, lowercase, Title Case, camelCase, and more

Compare two texts side-by-side with word and character-level highlighting

Count words, characters, sentences, and reading time instantly

Analyze keyword frequency and density in any text for SEO optimization

Generate complete SEO meta tags, Open Graph, and Twitter Cards

Preview how your page appears when shared on Facebook, Twitter, LinkedIn, Slack

Create robots.txt files with allow/disallow rules, sitemaps, and crawl delays

Generate XML sitemaps for search engines with priority and changefreq

Merge multiple PDFs or split pages — all in your browser