Base64 Encoder / Decoder
Encode/decode text, files, and images to/from Base64 with copy/download and image preview.
Input
Output
Base64 encoder and decoder for text, files, images, and developer workflows
This Base64 encoder and decoder helps you convert content between raw data and Base64 format directly in your browser. It is useful when you need to encode text for transport, inspect encoded payloads, decode files, or preview image data without using a third-party upload service.
It is especially helpful for developers, technical support teams, security engineers, and anyone debugging APIs, tokens, config values, or embedded data URIs.
What this Base64 tool helps you do
- encode plain text into Base64
- decode Base64 strings back into readable or usable content
- convert files and images to Base64
- preview decoded image data in the browser
- copy or download results for use in apps, APIs, and config files
Common Base64 use cases
Developer workflows
- • embedding small images as data URIs
- • encoding text for transport in JSON or headers
- • inspecting encoded payloads during debugging
- • converting files for test fixtures or demos
Security and ops work
- • decoding Base64 found in logs or tokens
- • checking encoded secrets and config values
- • inspecting JWT sections and auth-related data
- • validating what an encoded blob actually contains
Why Base64 is commonly used
Base64 is a text-safe encoding format that makes it easier to move binary or structured data through systems that are designed to handle text. It is not encryption, and it is not meant to hide sensitive information. Its main purpose is compatibility and transport.
That is why you often see Base64 inside JSON payloads, data URLs, tokens, headers, environment variables, and other technical workflows.
Good habits when working with Base64
Recommended
- • verify what encoded data contains before using it
- • remember Base64 is encoding, not security
- • use browser-local tools for sensitive debugging where possible
- • check decoded file type or content before sharing it
Avoid
- • assuming Base64 protects secrets or private data
- • pasting sensitive values into unknown external tools
- • confusing encoding issues with encryption issues
- • using large Base64 blobs where a direct file reference would work better
Related developer tools
This tool pairs well with the JWT Decoder, JSON Formatter, URL Builder, and Regex Tester when you are debugging payloads, API requests, tokens, or encoded values in browser-safe workflows.
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Frequently Asked Questions
Is the conversion secure?
Yes, it runs entirely in your browser and does not upload files.