Base64 Encode Online
Convert plain text to Base64 for data URIs, basic auth headers, or embedding small payloads. Encoding uses the browser's Unicode-safe path so characters are not corrupted.
How to use Base64 Encode
Drop the text, table, or snippet that needs base64 encode into the input box.
Toggle the checkboxes or fields if the tool offers them, then watch the output update.
Use Copy or Save. Because this runs locally, you can work on private data without an account.
Why use this tool?
The Problem
Copying binary-ish strings into XML, JSON, or headers often breaks on quotes, newlines, and non-ASCII bytes.
The Solution
This encoder turns your text into a Base64 string you can paste into configs, data URIs, or HTTP headers.
Common Use Cases
- Build data URIs
- Prepare basic auth strings
- Embed small text in JSON
How it works
Text is encoded as UTF-8 then converted with btoa-compatible Base64 so Unicode is preserved. All calculations and text processing routines execute locally using standard JavaScript inside your browser. No contents are uploaded to any server.
Before / After Example
Hello, ATG!
SGVsbG8sIEFURyE=
Tips & Best Practices
For files, paste the text contents. This is a string encoder, not a file host.
Common Mistakes
Encoding already-encoded Base64 doubles it. Decode first if the input already looks like A-Za-z0-9+/=.
Frequently Asked Questions
How do I use Base64 Encode online?
Paste your input into Base64 Encode, adjust any options, and copy the result. Encode ASCII strings to Base64 hashes. All processing stays in the tab.
Does Base64 Encode upload my data?
No. Base64 Encode runs in your browser with JavaScript. Answer to Geek does not receive the text, CSV, tokens, or files you paste.
Does Base64 encrypt my text?
No. Base64 is encoding, not encryption. Anyone can decode it. Do not treat it as a way to hide secrets.
What should I try after Base64 Encode?
Related tools on this site include base64 decode, url encoder, hex encode. Open those when you need a follow-up transform on the same data.