About Base64 Encode/Decode
The Base64 Encode/Decode tool converts text to Base64 and back instantly. Base64 is a binary-to-text encoding widely used to embed data in URLs, JSON payloads, HTML data URIs, email attachments and HTTP basic authentication headers.
Paste plain text to encode it, or paste a Base64 string to decode it back to readable text. The tool handles Unicode correctly, so emoji, accented characters and non-Latin scripts round-trip without corruption. Invalid Base64 input is detected and reported with a helpful error instead of producing garbage output.
Like every tool on this site, encoding and decoding run entirely in your browser — your data is never sent anywhere.
How to Use the Base64 Encode/Decode
- Choose Encode or Decode mode.
- Paste your text (or Base64 string) into the input box.
- The converted result appears instantly below.
- Click Copy to copy the result to your clipboard.
Features
- Instant two-way conversion between text and Base64
- Full Unicode support (emoji, accents, non-Latin scripts)
- Validation with clear errors for malformed Base64
- One-click copy of the result
Frequently Asked Questions
What is Base64 encoding used for?
Base64 represents binary data using only 64 safe ASCII characters. It's commonly used for data URIs in HTML/CSS, JSON payloads, email attachments (MIME) and basic authentication credentials.
Is Base64 encryption?
No. Base64 is an encoding, not encryption — anyone can decode it. Never use Base64 alone to protect secrets or sensitive data.
Is the Base64 converter free?
Yes, the Base64 converter is completely free with no usage limits. No signup, no account and no installation required.
Is my data safe?
Yes. All processing happens locally in your browser using JavaScript — nothing you type is uploaded or stored on our servers.
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