Translate text and bytes
Base64 Encoder and Decoder
Choose text or a local file, encode it into Base64, or paste Base64 to decode. Preview text results and download binary output when needed.
Private by default
Processing stays in your browser. Your file is not sent anywhere by this tool.
Accepted input
UTF-8 text, Local file, Base64 text
Available output
Base64 text, Decoded UTF-8 text, Decoded file
Three clear moves
How to use Base64 Encoder and Decoder
- 01
Choose a direction
Select encoding or decoding, then add text, a file, or a Base64 string.
- 02
Run the conversion
Create the translated output and review any invalid-input message.
- 03
Copy or download
Copy text output or save decoded binary content as a file.
Good fits
When this tool is useful
- Encode a small asset for a data URL experiment.
- Inspect a Base64 text value during development.
- Decode a known file payload received from an API response.
Know before processing
Browser and format limits
- Base64 makes data larger and is not a form of encryption.
- Decoded binary content may not produce readable text.
- Large files can create long strings and use substantial browser memory.
Better output
Practical tips
Do not use Base64 to protect private information.
Keep the original filename and content type when decoding a known file.
Use a file transfer method instead of Base64 for very large assets.
Straight answers
Base64 Encoder and Decoder questions
Is Base64 encryption?
No. It is a reversible encoding that represents bytes as text and provides no secrecy.
Why is Base64 longer than the original?
The text representation adds overhead, so encoded data is typically larger than the source bytes.
Why is decoded output unreadable?
The source may represent binary content such as an image or PDF rather than UTF-8 text. Download it as a file instead.
Keep working
Related tools
File Hash Generator
Generate SHA-256, SHA-384, or SHA-512 checksums for files or text.
Read structured data clearlyJSON Formatter and Validator
Format, minify, and validate JSON with readable parse errors.
Turn a link into a scanQR Code Generator
Create a downloadable QR code for a URL or short piece of text.
Need the repeatable version?
Put file work inside your workflow.
AI Guys builds custom applications and automations when a browser utility needs approvals, integrations, or reliable scale.