Developer Utilities
Free developer utilities: JSON/XML/CSS/SQL formatters, Base64 and URL encoding, JWT decoder, regex tester, UUIDs, hashes, timestamps, QR codes and barcodes.
JSON Formatter
Format, beautify and validate JSON with 2-space, 4-space or tab indentation — errors pinpointed instantly.…
JSON Minifier
Minify JSON to a single compact line — validated first so broken JSON never ships.…
JSON Validator
Validate JSON syntax with precise error messages — fix trailing commas and quote issues fast.…
XML Formatter
Format and indent XML documents — or minify them — entirely in your browser.…
HTML Formatter
Re-indent messy HTML markup for readability, or minify it for production.…
CSS Formatter
Format CSS with consistent indentation and one declaration per line — or minify for production.…
JavaScript Formatter
Basic JavaScript beautifier: restores indentation and line breaks to minified or messy code.…
SQL Formatter
Format SQL queries with uppercase keywords and clause-per-line layout.…
Markdown Editor & Preview
Write Markdown with a live side-by-side preview — export the HTML or download the .md file.…
CSV Viewer
Paste CSV and view it as a clean sortable table — quotes and commas handled correctly.…
CSV to JSON
Convert CSV data to a JSON array of objects using the header row as keys.…
JSON to CSV
Convert a JSON array of objects into properly quoted CSV.…
Base64 Encoder
Encode text to Base64 — Unicode-safe, instant and local.…
Base64 Decoder
Decode Base64 back to text — Unicode-safe, instant and local.…
URL Encoder
Percent-encode URLs or individual components for safe transmission.…
URL Decoder
Decode percent-encoded URLs back to readable text.…
JWT Decoder
Decode JWT headers and payloads locally — expiry checked, signature never sent anywhere.…
Regex Tester
Test regular expressions live with match highlighting and capture-group display.…
UUID Generator
Generate cryptographically random UUID v4 identifiers — singly or in bulk.…
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes with the Web Crypto API — nothing leaves your device.…
Timestamp Converter
Convert Unix timestamps to human dates and back — seconds or milliseconds, UTC, local and relative.…
Unix Time Converter
Live Unix epoch clock plus two-way conversion between timestamps and dates.…
QR Code Generator
Generate QR codes for URLs and text with custom colors and sizes — download as PNG.…
Barcode Generator
Generate Code 128, Code 39, EAN-13, UPC and more — download as crisp SVG.…