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.
QR Code Generator
Generate QR codes for URLs and text with custom colors and sizes — download as PNG.
JSON Formatter
Format, beautify and validate JSON with 2-space, 4-space or tab indentation — errors…
Base64 Encoder
Encode text to Base64 — Unicode-safe, instant and local.
URL Encoder
Percent-encode URLs or individual components for safe transmission.
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.
Timestamp Converter
Convert Unix timestamps to human dates and back — seconds or milliseconds, UTC, local…
Base64 Decoder
Decode Base64 back to text — Unicode-safe, instant and local.
URL Decoder
Decode percent-encoded URLs back to readable text.
Unix Time Converter
Live Unix epoch clock plus two-way conversion between timestamps and dates.
JWT Decoder
Decode JWT headers and payloads locally — expiry checked, signature never sent anywhere.
JSON Validator
Validate JSON syntax with precise error messages — fix trailing commas and quote issues…
JSON Minifier
Minify JSON to a single compact line — validated first so broken JSON never ships.
Markdown Editor & Preview
Write Markdown with a live side-by-side preview — export the HTML or download the .md file.
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes with the Web Crypto API — nothing…
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.
SQL Formatter
Format SQL queries with uppercase keywords and clause-per-line layout.
XML Formatter
Format and indent XML documents — or minify them — entirely in your browser.
CSV Viewer
Paste CSV and view it as a clean sortable table — quotes and commas handled correctly.
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…
JavaScript Formatter
Basic JavaScript beautifier: restores indentation and line breaks to minified or messy code.
Barcode Generator
Generate Code 128, Code 39, EAN-13, UPC and more — download as crisp SVG.