Tools
20 fast, no-nonsense developer utilities. Everything runs in your browser — no uploads, no tracking, works offline.
Format
Encode
Base64 Encode / Decode
Text ↔ Base64, UTF-8 safe
Encode text to Base64 or decode it back. Handles Unicode correctly.
JWT Decoder
Inspect header & payload
Decode a JSON Web Token into its header and payload. Shows expiry. No signature data leaves your browser.
URL Encoder / Decoder
Percent-encode URL components
Encode or decode URI components and query strings safely.
Hash Generator
SHA-1 / 256 / 384 / 512
Hash text with the Web Crypto API. Supports SHA-1, SHA-256, SHA-384, SHA-512.
HTML Entity Encode / Decode
Escape & unescape HTML
Encode reserved HTML characters to entities or decode them back to plain text.
Convert
Unix Timestamp Converter
Epoch ↔ human date
Convert Unix timestamps to readable dates and back. Local and UTC.
Color Converter
HEX ↔ RGB ↔ HSL + picker
Convert between HEX, RGB, and HSL with a live preview and picker.
Number Base Converter
Bin / Oct / Dec / Hex
Convert integers between binary, octal, decimal, and hexadecimal.
JSON to TypeScript
JSON → interfaces
Generate TypeScript interfaces from a JSON sample. Infers nested objects, arrays, and optional fields.
CSV ↔ JSON Converter
Tables ↔ objects
Convert CSV to a JSON array of objects and back. Handles quoted fields, commas, and newlines.
Cron Expression Parser
Decode cron to plain English
Break down a 5-field cron expression into each field and a human-readable schedule. Supports @daily-style aliases.
Text
Diff Checker
Compare two blocks line by line
Side-by-side line diff for text, config, or code. Highlights added and removed lines.
Case Converter
camel, snake, kebab, Title…
Transform text between camelCase, snake_case, kebab-case, Title Case, and more.
Slug Generator
Text → clean URL slug
Turn any heading or title into a clean, URL-safe slug.
Word & Character Counter
Counts + reading time
Live counts of words, characters, sentences, lines, and estimated reading time.
Regex Tester
Live match highlighting
Test a JavaScript regular expression against text with live match highlights.
Generate
UUID Generator
Bulk v4 UUIDs, one click
Generate cryptographically-random version-4 UUIDs in bulk.
Lorem Ipsum Generator
Placeholder paragraphs
Generate placeholder text by words, sentences, or paragraphs.
Password Generator
Strong, crypto-random
Generate strong random passwords with adjustable length and character sets. Uses the Web Crypto API.