Is my Base64 string sent to a server?

No. Decoding happens entirely in your browser, which is safer for tokens or data you'd rather not upload anywhere.

What if I get an error decoding?

An error usually means the input isn't valid Base64 — check for missing characters or extra whitespace that may have been added when copying.

Can this decode Base64 images back to a file?

This tool outputs decoded text. For image data URIs, use it alongside the Image to Base64 tool if you need to inspect the raw string.

Base64 Decode

Decode any Base64-encoded string back into readable plain text, entirely in your browser.

Base64 input Decoded text

Overview

Decode any Base64-encoded string back into readable plain text, entirely in your browser.

Benefits

Instant, browser-based decoding
No data sent to a server
Clear error handling for invalid input
Free with no character limits for typical use

Use Cases

Reading Base64 payloads from API logs
Inspecting encoded values during debugging
Decoding authentication header values
Checking data embedded in tokens or config files

Users Also Use

How to Use

Paste the Base64-encoded text.
Click Decode.
View and copy the decoded plain-text output.

FAQ

Is my Base64 string sent to a server?: No. Decoding happens entirely in your browser, which is safer for tokens or data you'd rather not upload anywhere.
What if I get an error decoding?: An error usually means the input isn't valid Base64 — check for missing characters or extra whitespace that may have been added when copying.
Can this decode Base64 images back to a file?: This tool outputs decoded text. For image data URIs, use it alongside the Image to Base64 tool if you need to inspect the raw string.

About Base64 Decode

Decode Base64 payloads from APIs, logs, and JWT tokens quickly and securely in your browser. Paste any Base64 string and instantly see the original plain-text content without uploading it anywhere.