Best Developer Tools

The best free developer utilities — JSON formatters, IP lookups and more. All rated 4.0★ or higher.

7 tools · rated 4★ or higher

Dev4.9
IP Address Lookup
Look up your public IP and any IPv4/IPv6 address — see country, city, ISP, and ASN.
Dev4.9
JSON Formatter
Format, validate, minify, and inspect JSON with helpful error messages.
Dev4.8
Base64 Encoder / Decoder
Encode and decode text or files to/from Base64 — fast, private, runs entirely in your browser.
Dev4.8
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Compute MD5, SHA-1, SHA-256, and SHA-512 hashes from any text — instantly, entirely in your browser.
Dev4.8
JWT Decoder
Decode JSON Web Tokens to inspect header, payload, and expiration — locally, no signature verification needed.
Dev4.8
URL Encoder / Decoder
Encode and decode URL components and inspect protocol, host, path, and query parameters.
Dev4.8
UUID Generator
Generate UUID v4 or UUID v7 identifiers in batches — copy individually or all at once.

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