Local-first · Ready instantly
Everyday utilities in one place
Format, encode, generate, convert — works offline-friendly in your browser. No uploads, no extensions.
Popular
JSON formatter
Pretty-print, minify, validate, sort keys — copy or download
JSON diff
Side-by-side compare with highlighted path differences
Encode / decode
Base64, URL, Unicode, HTML entities, and Hex
Hash
MD5, SHA-1, SHA-256, and SHA-512 digests
Timestamp
Unix seconds/ms ↔ local and UTC time
Regex tester
Live match, capture groups, and replace preview
UUID generator
Batch UUID v4 with optional hyphens and case
QR code
Generate QR codes from text or URLs, download PNG
Color converter
HEX / RGB / HSL with live preview
Keep awake
Prevent screen sleep for demos, reading, or monitoring
All tools(22)
JSON formatter
Pretty-print, minify, validate, sort keys — copy or download
JSON diff
Side-by-side compare with highlighted path differences
Encode / decode
Base64, URL, Unicode, HTML entities, and Hex
Hash
MD5, SHA-1, SHA-256, and SHA-512 digests
JWT decoder
Decode header and payload, inspect expiry
Timestamp
Unix seconds/ms ↔ local and UTC time
Regex tester
Live match, capture groups, and replace preview
Code beautify
Light indent for JS, CSS, HTML, JSON, and SQL
Base converter
Binary, octal, decimal, and hexadecimal
UUID generator
Batch UUID v4 with optional hyphens and case
Password generator
Strong random passwords with custom charset
QR code
Generate QR codes from text or URLs, download PNG
Cron explainer
Parse 5/6-field cron expressions
Text tools
Counts, case, dedupe, sort, reverse
Markdown preview
Write and preview headings, lists, code blocks
URL parser
Break down protocol, host, path, and query
Color converter
HEX / RGB / HSL with live preview
Image Base64
Image ↔ Data URL / Base64, fully local
CSS units
px / rem / em with configurable root size
JSON path
Extract by dotted path, e.g. user.profile.name
String escape
Escape / unescape JS, JSON, and shell strings
Keep awake
Prevent screen sleep for demos, reading, or monitoring