Encode
Turn text or files into Base64
Enter UTF-8 text or choose a file, then copy or download the encoded result. Enable the URL-safe alphabet and optional padding removal when a web token or URL requires them.
Private developer tools
Base64 Encoder & Decoder
Encode Unicode text or files, decode Base64 into text or original bytes, and create URL-safe output without sending content to a server.
Plain text or file
Content to encode
Converted locally. Your text and files are never uploaded.
Conversion result
Base64 output
Decode
Recover text or binary bytes
Paste standard or URL-safe Base64. Read valid UTF-8 directly, or download binary content without forcing it through a text conversion.
How to use it
Get a reliable result
- Choose encode or decode and select text or file input.
- Choose standard or URL-safe Base64 where applicable.
- Inspect the size and validation result, then copy text or download decoded bytes.
Useful for
Common workflows
- Embed a small asset in a data-oriented workflow
- Inspect a Base64-encoded text payload
- Translate between standard and URL-safe token alphabets
Examples
What to expect
Unicode text
- Input
- Hello, café ☕
- Output
- UTF-8 bytes represented with the selected Base64 alphabet
Know before you start
Important limitations
- Base64 increases binary size by roughly one third before surrounding transport overhead.
- Decoding cannot determine a file's trustworthy name or type from raw Base64 alone.
- The browser applies input-size limits because conversion temporarily holds both source and encoded forms in memory.
Common questions
Base64 FAQ
Is my text or file uploaded?
No. Base64 encoding and decoding happen entirely in your browser, and your content is never uploaded.
Does this support Unicode text?
Yes. Text is converted with UTF-8, so accented characters, non-Latin scripts, and emoji round-trip correctly.
What is URL-safe Base64?
URL-safe Base64 substitutes hyphens and underscores for plus signs and slashes. Padding can also be omitted when required.
Can it decode binary data?
Yes. When decoded bytes are not valid UTF-8 text, the tool offers them as a binary download instead of displaying damaged characters.
Browser-local
Processed on your device
Text, files, and converted results stay in this browser and are never uploaded.
How this processing works
The tool reads and processes this input in your browser. Tool Packer's application server does not receive the input or generated result.
Read the full privacy explanation