Base64derful
Encode text or files to Base64 and decode it back. Supports URL-safe variant, image preview and binary hex dump.
Diffderful
Side-by-side text and JSON comparison. Instantly highlight additions, deletions, and modifications with synchronized scrolling.
JSONderful
Format, validate, minify and explore JSON with a clean tree view. Paste messy data in, get beauty back out.
JWTderful
Decode, inspect and verify JWTs. See header and payload with claims breakdown, signature verification and an encoder too.
Markdownderful
Live Markdown editor and previewer. Write in Markdown on the left, see the beautifully rendered HTML on the right. Supports code highlighting.
Mermaidderful
Live Mermaid.js diagram editor and viewer. Type diagram code on the left, see the rendered flowchart, sequence diagram, or Gantt chart on the right.
Mockderful
Generate realistic fake data instantly. Define a simple schema with aliases like @name or @uuid to export thousands of rows in JSON or CSV format.
Swaggerderful
Instant OpenAPI and Swagger spec renderer. Paste your YAML or JSON to immediately generate beautiful, interactive API documentation.
Timestampderful
Smart epoch and date converter. Instantly parse Unix timestamps or ISO strings into standard formats, human-readable dates, and global timezones.