Decode greeting
SGVsbG8sIEJ5dGVCZW5jaCE=
Hello, ByteBench!
Encoding Tools
Base64 Decode and Encode
Encode and decode Base64 and Base64URL strings locally.
At a glance: This Base64 decode tool converts text to and from Base64 and Base64URL locally in your browser. It supports UTF-8 text and URL-safe Base64 variants, making it useful for payload inspection, simple data transport, and developer debugging.
Your input is processed locally in your browser and is not uploaded to ByteBench servers.
Loading browser tool.
How to use this tool
- Paste or type your input into the tool area.
- Choose the mode or options that match your task.
- Review validation messages before copying the output.
- Use the example button when you want a known-good starting point.
Examples
Common use cases
- Decode API payload snippets.
- Encode UTF-8 text for test fixtures.
- Convert Base64URL values from tokens or URLs.
When to use this tool
Use this base64 decode page when you need to encode and decode Base64 or Base64URL strings quickly during debugging, review, migration, or documentation work and want to keep raw input in your browser session.
If your task shifts, URL Encoder and Decoder and JWT Decoder are usually the next useful tools.
Input and output expectations
- Expected input shape: Paste the exact value you want to inspect, decode, parse, or transform, including delimiters when relevant.
- Typical output: A converted or parsed representation you can copy into debugging notes, requests, tests, or scripts.
- Quick input example: SGVsbG8sIEJ5dGVCZW5jaCE=
- Quick output example: Hello, ByteBench!
Common mistakes to avoid
- Using decode mode when the input is already decoded.
- Mixing URL-safe and standard variants in encoded data.
- Comparing transformed output without confirming source mode.
Notes and edge cases
Base64 is an encoding format, not encryption. Anyone with the encoded value can decode it, so avoid treating Base64 as a security boundary.
For privacy-sensitive data, keep using the tool in a trusted browser session and avoid pasting secrets into shared screens, screenshots, browser extensions, or remote support sessions.
FAQ
Does this Base64 tool upload my input?
No. This Base64 tool runs in your browser and does not send your input to ByteBench servers.
What input format works best in this Base64 tool?
Use clean UTF-8 Base64 and Base64URL input and run the example first when you want a known-good baseline. If your pasted data came from logs or docs, remove accidental wrappers before validating or converting.
How should I validate results from this Base64 tool?
Review the status message, compare output with expected behavior, and run one quick edge-case check. ByteBench helps with utility work, but production-critical output should still be verified in your project pipeline.