Developer Tools — UUID, JSON, Base64 & More
Free developer tools: UUID generator, JSON formatter, Base64 codec, hash generator, URL codec. 100% client-side.
UUID Generator
Generate UUIDs/GUIDs v1, v4 and v7 online. Copy or batch export. 100% free and browser-based.
JSON Formatter
Format, minify and validate JSON online with syntax highlight. Detects errors. 100% free.
Base64
Encode and decode Base64 online. Supports UTF-8 text and files. 100% free and browser-based.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from text or file online. Compare hashes. 100% free.
URL Encode/Decode
Encode and decode URLs online. Supports encodeURI and encodeURIComponent. 100% free.
JSON ↔ CSV
Convert JSON to CSV and CSV to JSON online. Table preview. Free download.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly. Supports large integers (BigInt). Simultaneous output in all 4 bases.
Lorem Ipsum Generator
Generate Lorem Ipsum text for design and development. Paragraphs, sentences, words or lists. Customizable from 1 to 100 units. Copy with one click.
Barcode Generator
Generate barcodes in EAN-13, EAN-8, Code128, UPC-A, ITF-14 and more formats. Download as PNG or SVG. Free for commercial use and testing.
QR Code Generator
Create custom QR Codes for URLs, text, email, phone and Wi-Fi. Choose size and error correction level. Download as PNG — 100% browser-based. Use now.