Base64 Encoder / Decoder for Analysts

Decode the base64 blob someone embedded in a JSON field, or encode one to embed in your schema.

The tools that come up when the actual job is interpreting data rather than collecting it: CSV viewer with column typing for the export you just got from the database, JSON formatter for the API response, regex tester against the source string, base64 for the binary blob someone embedded in a JSON field, hash for source verification, and the AI summarizer for digesting long-form sources.

Open the Base64 Encoder / Decoder →

What it does for Data analysts and researchers

Encode or decode text, or drop in a binary file - both go through the same field.
Handles UTF-8 correctly, so non-ASCII characters survive the round trip rather than becoming mojibake.
Useful when debugging an API that returns a binary blob inside a JSON string, or when you are writing such an API and need to inspect what got encoded.

How to use it

Paste the text or drop the file in. Switch direction with one click if you picked the wrong mode.
If you encoded a binary file, copy the base64 string and use it in your code, your schema, or your database.
If you decoded, the bytes come back as a download - save them and diff against the original to confirm.

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Common questions

Why will my string not decode?

Base64 must be padded to a multiple of four characters and use the standard alphabet. URL-safe variants swap plus and slash for hyphen and underscore, and a truncated string simply has no valid last group.

Is base64 a form of encryption?

No - it is an encoding that anyone can reverse in one step. Never use it to protect a credential, and never treat an encoded parameter as if it had been secured.

Why does a base64 string end in one or two equals signs?

Padding completes the final four-character group. Strip it only if the receiving system explicitly expects the unpadded form - some decoders reject a padded string.