Free, fast, privacy-first online tools for developers. All processing happens in your browser — nothing is sent to a server. 123 tools and growing!
Encrypt text with AES-256-CBC.
Complete ASCII reference table.
Calculate image aspect ratios.
Convert between binary, octal, decimal, hex.
Encode text or files to Base64, or decode Base64.
Generate password hashes.
Convert binary to text and back.
Generate rounded corner CSS.
Create box-shadow effects.
Convert between data units.
Convert text between 12+ case formats.
Check WCAG contrast ratios.
Pick colors and convert HEX/RGB/HSL.
Validate credit card numbers.
Generate cron schedules visually.
Format CSS with configurable indentation.
Create CSS gradients visually.
Minify and beautify CSS code.
Convert px, rem, em, vw, vh.
Generate CSV test data.
Convert CSV data to JSON.
View CSV data in a table.
Add/subtract days from dates.
Enhanced diff with options.
Check DNS records: A, MX, NS, TXT, and more.
Remove duplicate lines from text.
Convert epoch timestamps to dates.
Create website favicons.
Design flexbox layouts visually.
Generate MD5, SHA-256, SHA-512 hashes.
Convert hex to decimal, binary, ASCII.
Generate HMAC signatures for APIs.
Encode or decode HTML entities.
Minify HTML code.
Write HTML with live preview.
Generate HTML tables visually.
Remove HTML tags from text.
Convert HTML to Markdown format.
Check response headers for any URL.
Browse HTTP status codes.
Convert images to Base64 data URIs.
Compress JPEG/PNG/WebP images up to 80%.
Resize images with aspect ratio lock.
Convert images to WebP format.
Find your public IP and geolocation.
Format, beautify, or minify JS code.
Minify JS code for production.
Convert between JSON and CSV formats.
Escape special chars in JSON.
Format, validate, and beautify JSON data.
Generate mock JSON test data.
Generate C# classes from JSON.
Generate Go structs from JSON.
Generate TypeScript interfaces from JSON.
Validate JSON syntax with detailed error messages.
Decode JWT tokens.
Randomly shuffle lists.
Generate placeholder text.
Write Markdown with live preview.
Convert Markdown to HTML with preview.
Convert text to Morse code.
Convert numbers to English words.
Generate secure passwords.
Check password strength.
Calculate percentages and changes.
Check server connectivity and response time.
Convert PNG to JPG with quality control.
Check if a TCP port is open or closed.
Generate QR codes from text or URL.
Generate random numbers.
Generate tokens and API keys.
Build regex with presets.
Test regex against sample text.
Convert numbers to Roman numerals.
Generate SEO-friendly slugs.
Format and beautify SQL queries.
Check SSL certificate validity.
Repeat text multiple times.
Convert SVG to raster PNG images.
Count words, characters, sentences.
Compare two texts side by side.
Reverse text or flip upside down.
Create text-shadow effects visually.
Sort lines by various criteria.
Analyze text with detailed stats.
Convert text to binary code.
Convert text to a URL-friendly slug.
Convert Unix timestamps to dates.
Convert time between time zones.
Convert TOML config to JSON.
Convert length, weight, temperature.
Break down any URL into components.
Encode or decode URLs and query parameters.
Parse UA strings to identify browser/OS.
Generate UUID v4, v7, and other versions.
Domain registration and ownership info.
Format and validate XML.
Convert between YAML and JSON formats.
Visual CSS Grid layout builder.
Create CSS triangles with border trick.
Apply CSS filter effects visually.
Create CSS clip-path shapes visually.
Generate color schemes from any base color.
Preview CSS easing curves with animation.
Test JSONPath expressions against JSON data.
Flatten/unflatten nested JSON objects.
Decode & < > back to plain text.
Convert cURL to JavaScript fetch().
Parse, validate, and format .env files.
Encode text to Base32 and back.
Decode percent-encoded URL strings.
Generate XML sitemaps for SEO.
Calculate CIDR subnet details.
Validate IBAN numbers.
Extract emails from text.
Generate CODE128 & EAN-13 barcodes.
Convert text/files to data: URIs.
Convert Unix permission bits.
Calculate SLA uptime percentage.
Convert SVG to React JSX.
Generate robots.txt files.
Format phone numbers.
Find closest CSS named color.