Text, Plain text
Plain text, the simplest data format. No formatting, no metadata, just characters. Universal compatibility across every device and program ever made.
How to open
Every text editor on every platform. Browser previews.
free · in-browser · no upload
Text to Base64
Converter
Drop your Text file. We'll convert it to Base64 right here in your browser, your file never leaves your device.
or drop your file
Select your file here to get started
or drop your file here.
Accepts .txt
nothing uploaded no file size cap no signup
How it works
Three steps. No upload, no signup.
- 1
Drop your file
Click the dropzone above or drag a Text from your desktop. Files of any size, there's no upload, so there's no upload limit.
- 2
Convert in your browser
The conversion runs entirely in this tab using JavaScript and WebAssembly. Your file never touches our servers, we don't have any.
- 3
Download
Get your Base64 the moment the conversion finishes. Convert another, or close the tab.
Files stay on your device
Your file is never uploaded. The entire conversion runs in your browser using WebAssembly. We can't see what you convert because we have no server to see it.
No file size limit
Server converters cap free users at 1-2 GB and gate larger files behind a paid plan. Since nothing uploads, our limit is whatever your browser can handle.
Free, no signup, no ads on conversions
No account required. No watermark on the output. No queue. Drop a file, get a converted file.
Why convert Text → Base64
What this conversion is actually for
Base64 is the standard for embedding binary data in text-only channels: email attachments (MIME), data: URIs in CSS, JWT payloads, JSON fields that need to carry images, every API that has a 'base64-encoded payload' parameter. Devs hit this 5x a day debugging.
A real example
You're inlining a small SVG icon into your CSS as a data: URI. You wrap the SVG markup, paste it here, and get back the base64 string for `data:image/svg+xml;base64,...`. No round-trip to a server-based tool that might log your data.
Troubleshooting
My base64 has line breaks every 76 characters — is that a problem?
MIME standard wraps base64 at 76 columns. Most modern parsers tolerate this. If your consumer is strict, the converter strips whitespace on decode automatically; you can also pre-strip with `tr -d '\n' < file.b64`.
Decoded text shows '?' or garbled characters.
Base64 encoded the bytes as-is — the encoding (UTF-8 vs Latin-1 vs UTF-16) of the original text matters. Our encoder uses UTF-8 throughout. If your source was Latin-1, multi-byte characters may decode incorrectly. Re-encode the source as UTF-8 first.
Formats involved
About Text and Base64
Base64, Base64 binary-to-text encoding (RFC 4648)
Base64 encodes any byte sequence as ASCII text using 64 printable characters (A-Z, a-z, 0-9, +, /, with = padding). Output is ~33% larger than input but survives every text channel that strips or mangles binary: email attachments (MIME), JSON fields, URLs (URL-safe variant), data: URIs, JWT payloads. The format dates to RFC 989 (1987) and was standardized in RFC 4648.
How to open
Any text editor displays base64. To decode back to bytes: `base64 -d` on Mac/Linux, `certutil -decode` on Windows, or paste into any base64 web decoder. Used heavily in dev tools, API debugging, and security workflows.
Convert your Text to other formats
FAQ
Common questions
Is this Text → Base64 converter really free?
Yes. No signup, no watermark, no daily file count limit. Every conversion runs in your browser, your file never touches our servers because there are no servers.
Where does my file go when I convert it?
Nowhere. The conversion runs entirely in your browser using JavaScript and WebAssembly. Your file is never uploaded to our servers. We don't have any servers handling files, there's nothing for us to log, store, or accidentally leak.
What's the maximum file size?
Whatever your browser can hold in memory. Practically, this means a few hundred MB on most computers, significantly larger than the 1-2 GB caps that server-upload converters charge for. Very large files (multi-GB) may require closing other browser tabs first.
Why convert Text to Base64?
Universal text interchange. Embedding binary data in text-only channels (email, JSON, URLs). The most common reason to convert is compatibility, Base64 works in places where Text doesn't, or vice versa.
How do I open a Text file in the first place?
Every text editor on every platform. Browser previews.
Does this work offline?
Once the page is loaded, the conversion itself runs entirely offline. The first time you use a tool, your browser downloads the conversion library (a one-time cache). If you reload while offline, the page won't load, but you can install the site as a Progressive Web App for full offline use.
Can I convert multiple files at once?
Single file at a time for now. Batch conversion is on the roadmap, for now, drop one file, download the result, then convert the next.