Encoder / Decoder

11 encoding formats with auto-detect magic mode, bulk line processing, and output-to-input chaining. All processing happens locally in your browser.

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Text → Encoded

Input

Output

What you can do with the Encoder / Decoder

URL-decode payloads — unwrap encoded XSS or injection strings to see what they actually execute, then re-encode to slip them past filters.
Inspect Base64 tokens — decode JWT segments, cookies, and data: URIs to read their contents.
CTF conversions — move between Hex, Binary, Octal, ROT13, and Punycode in one place.
Auto-detect (magic mode) — paste unknown-looking data and the decoder guesses the format and unwraps it for you.
Bulk mode — encode or decode hundreds of lines at once.

Everything runs locally in your browser — your input is never uploaded or logged. Need to chain several transforms together (encode, hash, then encrypt)? Use the multi-step Encoding Pipeline.

Supported encode / decode formats

Encode or decode between every common format, with auto-detect (magic mode) for unknown input:

Base64 — plus Base32, Base58, and Base85 / Z85
URL — single and double percent-encoding
HTML entities — named and numeric
Hex — and hex-escape strings
Unicode escapes
Binary, Octal, Decimal
ROT13 and Morse code
Punycode for IDN domains
Quoted-Printable and UUencode
JWT Base64 segment decoding

Related Tools

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What Is This?

Auto-identify unknown data blobs with confidence scores.

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What you can do with the Encoder / Decoder

URL-decode payloads — unwrap encoded XSS or injection strings to see what they actually execute, then re-encode to slip them past filters.

Inspect Base64 tokens — decode JWT segments, cookies, and data: URIs to read their contents.

CTF conversions — move between Hex, Binary, Octal, ROT13, and Punycode in one place.

Auto-detect (magic mode) — paste unknown-looking data and the decoder guesses the format and unwraps it for you.

Bulk mode — encode or decode hundreds of lines at once.

Everything runs locally in your browser — your input is never uploaded or logged. Need to chain several transforms together (encode, hash, then encrypt)? Use the multi-step Encoding Pipeline.

Supported encode / decode formats

Encode or decode between every common format, with auto-detect (magic mode) for unknown input:

Base64 — plus Base32, Base58, and Base85 / Z85

URL — single and double percent-encoding

HTML entities — named and numeric

Hex — and hex-escape strings

Unicode escapes

Binary, Octal, Decimal

ROT13 and Morse code

Punycode for IDN domains

Quoted-Printable and UUencode

JWT Base64 segment decoding