JSON Formatter & Validator
Format (beautify) or minify JSON — invalid syntax is highlighted
Hash Generator
SHA-1, SHA-256, SHA-384, SHA-512 — uses browser's native SubtleCrypto API
UUID Generator
Bulk-generate UUIDs (v4 / v7 / nil) — copy all or download as TXT
Regex Tester
Live pattern matching with flag toggles and highlighted matches in the test string
URL Encode / Decode
Percent-encode text for URLs or decode encoded strings back to plain text
HTML Entity Encode / Decode
Escape HTML special characters (&, <, >, ") or unescape them
Number Base Converter
Type in any field — instantly converted to Binary, Octal, Decimal, Hexadecimal
Roman Numeral Converter
Convert Arabic numbers (1–3999) to Roman numerals and vice-versa
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Lorem Ipsum Generator
Generate placeholder text with configurable paragraphs and sentences per paragraph
Markdown Preview
Live side-by-side markdown rendering — type on the left, see HTML on the right
Markdown
Preview
CSS Minifier
Minify CSS and see size reduction percentage
JSON ↔ CSV
Convert JSON array to CSV or CSV to JSON — auto-detect format
Diff Checker
Highlight added and removed lines between two texts
Original
Modified
CRON Parser
Parse cron expressions and show next 5 run times
JWT Encoder / Decoder
Sign, decode and validate JWT tokens (HS256) — browser-only
Payload (JSON)
Secret
SQL Formatter
Beautify & format SQL queries — MySQL, PostgreSQL, SQLite, Standard SQL
Dialect
Indent
Character Diff
Highlight exact character changes between two short strings
Code Formatter
Beautify JS, HTML, CSS, JSON and SQL — copy or download formatted code
Language
Indent