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Online developer tools
Format JSON, encode or decode Base64 and URLs, generate UUIDs and hashes, and handle common developer text tasks.
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10
Epoch ConverterConvert Unix timestamps (seconds or milliseconds, auto-detected) to human-readable dates in local time, UTC, and ISO 8601 — and dates back to epoch. Live current timestamp.
JSON FormatterFormat, validate, and minify JSON in your browser: pretty-print with your preferred indent, get exact error line and column, copy the result. Nothing is uploaded.
Password GeneratorGenerate strong random passwords with custom length and character sets. Cryptographically secure, generated entirely in your browser — nothing is ever sent anywhere.
Base64 Encode/DecodeEncode text to Base64 and decode Base64 to text, with full Unicode/UTF-8 support — emoji and Chinese included. Live, private, in-browser.
Case ConverterConvert text between 10 cases live: UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and aLtErNaTiNg.
Hash GeneratorGenerate MD5, SHA-1, SHA-256, and SHA-512 hashes of any text instantly in your browser. With honest guidance on which hashes are still safe to use.
Lorem IpsumGenerate lorem ipsum placeholder text: choose paragraphs and words per paragraph, start with the classic opening, copy in one click.
Slug GeneratorTurn any title into a clean URL slug: lowercase, hyphens, accents stripped (Crème → creme). Live conversion with one-click copy.
URL Encode/DecodeURL-encode and decode text live: spaces, unicode, and special characters to percent-encoding and back. Understand %20 vs + and encodeURIComponent.
UUID GeneratorGenerate cryptographically random UUID v4 identifiers — one or up to 100 at once, copy-ready. Learn the format and collision math.
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