Browser-onlyNo upload

URL and HTML Encoder

Encode or decode URLs and HTML entities entirely in your browser.

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UUID Generator

Generate cryptographically random UUID v4 values locally.

Hash Generator

Generate SHA-256, SHA-384, SHA-512, or SHA-1 digests locally.

JWT Decoder

Inspect JWT headers and payloads locally without validating or uploading tokens.

Regular Expression Tester

Test JavaScript regular expressions and review matches instantly.

Markdown to HTML Converter

Convert Markdown text into clean HTML entirely in your browser.

JSON to CSV Converter

Convert a JSON array of objects into CSV, with nested fields flattened.

CSV to JSON Converter

Parse CSV text and convert it to a JSON array of objects.