Data & Format Converters
Convert between the formats developers actually move data through. Moving data between formats or time representations is a constant, low-glamour part of building things — these convert cleanly in either direction without an account or a size cap.
JSON ⇄ CSV Converter
Convert between JSON and CSV in either direction, with no file-size cap.
Runs entirely in your browser Data & Format ConvertersMarkdown ⇄ HTML Converter
Convert Markdown to clean HTML, or HTML back to Markdown.
Runs entirely in your browser Data & Format ConvertersUnix Timestamp Converter
Convert between Unix time and a readable date in any timezone.
Runs entirely in your browser Data & Format ConvertersCron Expression Generator
Build and get a plain-English explanation of standard and Quartz-style cron expressions.
Runs entirely in your browser Data & Format ConvertersJWT Decoder
Decode a JWT token in your browser — header, payload, and expiry, with optional HS256 signature verification.
Runs entirely in your browser Data & Format ConvertersBase64 Encoder/Decoder
Encode and decode Base64 with correct UTF-8 handling, a URL-safe variant, and file-to-data-URL conversion.
Runs entirely in your browser Data & Format ConvertersUUID Generator
Generate v4 and v7 UUIDs in bulk — with case and hyphen options, download, and a UUID inspector.
Runs entirely in your browser Data & Format ConvertersHash Generator
Compute MD5, SHA-1, SHA-256, and SHA-512 checksums of text or files, with hash compare and type detection.
Runs entirely in your browser Data & Format ConvertersURL Encoder/Decoder
Encode and decode URLs with correct UTF-8 handling, live conversion, and double-encoding warnings.
Runs entirely in your browser Data & Format ConvertersAI Token Estimator
Estimate LLM token counts for GPT and Claude-style models, with word/character stats and optional cost math.
Runs entirely in your browser Data & Format ConvertersRegex Tester
Test regular expressions with live match highlighting, flag toggles, capture-group inspection, and presets.
Runs entirely in your browser Data & Format ConvertersPassword Generator
Generate strong random passwords with crypto-grade randomness and an honest entropy readout.
Runs entirely in your browser Data & Format ConvertersColor Converter
Convert between HEX, RGB, HSL, and CMYK with a visual picker and a WCAG contrast checker.
Runs entirely in your browser Data & Format ConvertersLorem Ipsum Generator
Generate classic placeholder text by words, sentences, or paragraphs — plain, HTML, or Markdown.
Runs entirely in your browser