Free Developer Tools
Developer tools that respect your privacy. Every tool in our Technology suite processes your data exclusively in your browser — your code and content never leaves your device. Fast, free, and private by design.
Hash Generator
Generate cryptographic hashes from text using MD5, SHA-1, SHA-256, SHA-512 and more. Learn how hashing works for security and data integrity.
Open calculator →JSON Formatter & Validator
Format, validate, and minify JSON data online. Handles large payloads efficiently with syntax highlighting, error detection, and tree view — all processed locally in your browser.
Open calculator →JavaScript Formatter & Validator
Format, validate, and minify JavaScript code online. Detects syntax errors instantly with clear error messages — all processed locally in your browser for speed and privacy.
Open calculator →Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text instantly. Supports UTF-8, file uploads, and data URI generation — all in your browser.
Open calculator →UUID Generator
Generate random UUID v4 identifiers instantly. Bulk generate up to 100 UUIDs with options for uppercase, lowercase, and hyphen formatting.
Open calculator →Word & Character Counter
Count words, characters, sentences, paragraphs, and reading time instantly. Analyze keyword density for SEO — all processing in your browser.
Open calculator →Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Live clock, ISO 8601, RFC 2822, relative time — all in your browser.
Open calculator →URL Encoder / Decoder
Encode or decode URLs with percent-encoding. Supports encodeURIComponent and encodeURI modes with a quick reference of common encoded characters.
Open calculator →JWT Decoder
Decode and inspect JSON Web Tokens instantly. View header, payload, claims, and expiration status — no data leaves your browser.
Open calculator →Color Converter
Convert colors between HEX, RGB, and HSL formats instantly. Visual preview, WCAG contrast checker, and complementary color — all in your browser.
Open calculator →Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text by paragraphs, sentences, or words. Classic Latin text for designers, developers, and content mockups.
Open calculator →Markdown Preview
Write Markdown and see a live HTML preview side by side. Supports headers, lists, tables, code blocks, bold, italic, links, and images.
Open calculator →QR Code Generator
Generate QR codes for URLs, text, and more. Customize size, colors, and error correction — download as PNG. Free, private, no sign-up needed.
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