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.htaccess Redirect Generator

Generate common .htaccess rules — redirects, HTTPS enforcement, and www handling.

Custom redirects (one per line: /old-path → /new-path)

TSV ⇄ CSV Converter

Convert between tab-separated and comma-separated values.

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Hash Identifier

Paste a hash and see which algorithm it most likely comes from.

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Credit Card Number Validator

Check a card number with the Luhn algorithm, in your browser only.

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Checksum & CRC Calculator

CRC-32, Adler-32, MD5 and SHA checksums of any file or text, calculated in your browser.

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MAC Address Lookup

Find the manufacturer of a device from its MAC address using the IEEE OUI registry.

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JSON Diff Tool

Compare two JSON documents and see what was added, removed or changed.

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