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13 tools

Developer Tools

Format, validate, encode and convert data without sending it anywhere. JSON, Base64, URL encoding, hashes, UUIDs, timestamps and regular expressions are all processed locally in your browser.

Developer Tools

Base64 Encoder

Encode text or a file to Base64 in your browser, with UTF-8 support and an optional URL-safe alphabet.

Base64 Decoder

Decode Base64 (standard or URL-safe) back to readable UTF-8 text, with clear errors for invalid input.

SHA-256 Hash Generator

Generate SHA-256, SHA-512, SHA-384 and SHA-1 hashes of text or files to verify downloads and compare data. Everything…

HTML Entity Encoder

Escape , &, quotes and optionally every non-ASCII character as HTML entities so code displays as text.

HTML Entity Decoder

Convert named and numeric HTML entities such as & and ’ back into readable characters.

JSON to CSV Converter

Convert JSON arrays into CSV for spreadsheets. Nested objects become dot-separated columns, and you can choose the delimiter.

JSON Formatter & Beautifier

Pretty-print JSON with your choice of indentation and optional key sorting. Errors are shown with line and column.…

JSON Validator

Check whether JSON is valid and find the exact line and column of any syntax error.

JSON Minifier

Remove all unnecessary whitespace from JSON and see how many bytes you save.

Regex Tester

Test JavaScript regular expressions against your text with highlighted matches, capture groups and a live replace preview.

Unix Timestamp Converter

Convert Unix epoch timestamps to readable dates in UTC and your local time zone, or turn a date…

URL Encoder / Decoder

Encode or decode URLs and query values with percent-encoding, and inspect a URL's host, path and parameters.

UUID Generator (v4)

Generate one or up to 1,000 random v4 UUIDs at once, with uppercase, no-hyphen and brace options.

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