Base64 Encoder and Decoder
Base64 Encoder and Decoder helps developers convert text, Base64 strings and files directly in the browser.
Encode text to Base64, decode Base64 to text, convert Base64URL values, encode files and download decoded output.
Use this when encoding a file to Base64. For decoding Base64 to a file, paste the Base64 text into the input above.
Stats and validation
Output
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What is Base64 encoding?
Base64 is an encoding method that represents binary data using text characters. Developers commonly use Base64 when data needs to travel through systems that expect text, such as JSON payloads, HTML, CSS, email bodies or HTTP headers.
Base64 is not encryption
Base64 does not protect or hide data. Anyone can decode it. It is useful for representation and transport, but it should not be used as a security mechanism for passwords, secrets or private values.
Base64URL explained
Base64URL is a URL-safe variant commonly used in JWTs and web tokens. It replaces characters that can be awkward in URLs and often removes padding. This tool can convert both standard Base64 and Base64URL-safe values.
Common Base64 use cases
- Encoding small files or images for data URLs.
- Debugging API payloads that contain encoded data.
- Inspecting token segments such as JWT headers and payloads.
- Creating test data for integration and unit tests.
- Converting text to Base64 for HTTP or configuration examples.
Frequently asked questions
Can this tool encode files?
Yes. Choose “Encode file to Base64”, select a file and run the tool. The output can be plain Base64 or a data URL.
Can this tool decode binary Base64?
Yes. Choose “Decode Base64 to downloadable file”, paste the Base64 value and download the decoded bytes as a file.
Does the input leave my browser?
This static tool processes input locally in your browser. File data is read by the page and converted client-side.