Your files stay on your device

Encoding tools

Base64, URL, hex, and other encoders and decoders: text in, text out, computed entirely in your browser.

9 tools

- Base64

Encode and decode, with a URL-safe alphabet option.
 (/encoding/base64)
- URL encoder

Percent-encode components or whole URIs, and back.
 (/encoding/url-encoder)
- Image ⇄ Base64

Image files to data URLs and back. The format is read from the bytes, dimensions are decoded, and nothing is re-encoded.
 (/encoding/image-base64)
- Base32 encoder

RFC 4648, base32hex, Crockford, and z-base-32 with separate alphabets.
 (/encoding/base32)
- Base58 encoder

Bitcoin-alphabet Base58 with an optional Base58Check checksum.
 (/encoding/base58)
- Base62 encoder

Base62 over an explicit alphabet, with duplicate characters refused.
 (/encoding/base62)
- Hex dump

Offsets, hex columns, and ASCII gutters with search and paging.
 (/encoding/hex-dump)
- HTML entities

Named and numeric entity encoding and decoding, ambiguous & preserved.
 (/encoding/html-entities)
- Punycode / IDN

Unicode hostnames to xn-- labels and back, with homograph warnings.
 (/encoding/punycode)

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Canonical HTML: https://nutter.tools/encoding/
Markdown version: https://nutter.tools/encoding/index.md
Plain-text version: https://nutter.tools/encoding/index.txt
Agent index: https://nutter.tools/llms.txt