Free Developer Tools

Generate QR codes for URLs, text, email, phone, and Wi-Fi instantly. Customize colors, download as PNG or SVG. Free, no signup, runs in your browser.

Format, validate, and beautify your JSON data instantly.

Generate strong, secure passwords with customizable options. Choose length, uppercase, lowercase, numbers, and symbols. Fast, secure, and runs entirely in your browser.

Summarize long articles, essays, and documents in seconds using AI. Runs entirely in your browser — no uploads, no API key, completely private.

Compare two JSON objects, find changed values, missing keys, added fields, and type mismatches instantly in your browser.

Test and validate regular expressions with live matches, capture groups, flags, and replace previews in your browser.

Decode JWT tokens, generate new tokens, verify signatures, and generate secret keys. Fast, secure, and runs entirely in your browser.

Decode JWT tokens to view header and payload. Inspect claims, expiration, and issuer. Fast, secure, runs entirely in your browser.

Generate JWT tokens with custom header and payload. Set expiration, issuer, and custom claims. Fast, secure, runs entirely in your browser.

Generate secure random secrets for JWT signing. Create strong HMAC secrets using cryptographic random generation. Fast, secure, runs entirely in your browser.

Verify JWT token signatures with your secret key. Validate token authenticity and integrity. Fast, secure, runs entirely in your browser.

Generate UUID v4 (Universally Unique Identifiers) for your projects. Create single or multiple UUIDs instantly. Fast, secure, and runs entirely in your browser.

Generate cryptographic hashes of your text using various algorithms including SHA-256, SHA-512, SHA-1, MD5, and more. Fast, secure, and runs entirely in your browser.

Encode text or files to Base64 and decode Base64 strings instantly. Runs entirely in your browser — nothing is sent to any server.

Convert colors between HEX, RGB, HSL, and HSB formats instantly. Pick colors visually and copy any format with one click.

Generate random numbers between any range instantly. Single or bulk generation, dice rolls, lottery picks, and more. Free, runs in your browser.

Convert numbers between binary, decimal, hexadecimal, and octal instantly. Supports integers and shows step-by-step conversion. Free, runs in your browser.

Compare two blocks of text and highlight every addition, deletion, and change line by line. Free, private, runs entirely in your browser.

Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds. See current epoch time live. Free, instant, runs in your browser.

Convert CSV to JSON and JSON to CSV instantly. Paste your data, choose direction, and download the result. Free, private, runs entirely in your browser.

Generate barcodes in Code 128, EAN-13, EAN-8, UPC-A, Code 39, and ITF formats. Download as PNG or SVG. Free, no signup, runs entirely in your browser.

Generate beautiful color palettes from any base color. Get complementary, analogous, triadic, and monochromatic schemes. Copy HEX, RGB, or HSL values instantly.

Write Markdown and see a live rendered preview side by side. Supports headings, tables, code blocks, and more. Free, runs in your browser.

Generate and validate cron expressions visually. Build cron job schedules with a simple UI, see human-readable descriptions, and test next run times. Free, no signup.

Detect whether text was written by AI (ChatGPT, GPT-4, Claude, Gemini) or a human. Analyze writing patterns and get an AI probability score. Free, no signup.

Convert HTML to clean Markdown instantly. Supports headings, links, images, lists, tables, and code blocks. Free, private, runs in your browser.