Tools / Encode / Decode
Encode / Decode Toolkit
Paste text once, see it transformed every way at once — Base64, URL, hex, and ROT13, encoded and decoded side by side. Useful when you don't already know which encoding you're looking at.
Everything runs locally in your browser — nothing you paste here is sent anywhere.
// About this tool
Encode / Decode Toolkit
This toolkit encodes and decodes text in four common formats at once: Base64, URL encoding, hexadecimal, and ROT13. Paste a value once and see every encoding — and every decode — side by side.
Everything runs locally in your browser, so it is safe to use with sensitive payloads, tokens, or fragments from an incident. There is no upload, no account, and nothing leaves your device.
It is built for the quick checks that come up daily in security and development work: decoding a Base64 blob from a log line, unescaping a URL, or spotting hex-encoded content in a suspicious file.
// When to use it
Decode a Base64 payload from a log line
Paste the blob and read the decoded text instantly, without piping through a terminal one-liner.
Compare encodings of the same input
See Base64, URL, hex, and ROT13 representations of one string at the same time — handy when you are not sure which format a value uses.
Work with encoded values offline
Since everything stays in your browser, the toolkit works even on an air-gapped or isolated workstation.
// Questions
Is my input uploaded anywhere?
No. All encoding and decoding happens in your browser. Nothing is sent to a server.
Which formats are supported?
Base64, URL encoding, hexadecimal, and ROT13 — each available in both encode and decode directions, shown side by side.
Can I use this for security incident work?
Yes. Because the tool is fully client-side, you can decode potentially sensitive payloads without exposing them to a third-party service.
Is ROT13 really a security tool?
ROT13 is an encoding, not encryption — it is trivially reversible. It is included for compatibility with legacy content and puzzle-style formats, not as any kind of protection.
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