Does this handle emoji and non-Latin text correctly?
Yes. It uses encodeURIComponent before btoa, which avoids the corruption a plain btoa call would cause on Unicode text.
Developer Tools
Encode Text to Base64
Encode any text, including Unicode characters, into Base64, right in your browser.
Why Unicode text encodes correctly here
This encoder runs your text through encodeURIComponent before btoa, which correctly handles Unicode characters — emoji, accented letters, non-Latin scripts — that a plain btoa(text) call would fail or corrupt on. A naive Base64 encoder in JavaScript often breaks on anything outside basic Latin1 characters; this one is built specifically to avoid that.
Base64 encoding is not encryption or a security measure — it's a reversible way to represent binary or text data using a limited set of printable characters, easily decoded by anyone with the string.
Workflow at a glance
Use this quick flow to understand where the tool fits in your work and what to review before relying on the output.
Review checklist
Before
Confirm you need standard Base64, not a URL-safe variant, since this encoder produces the standard format.
After
Decode the output with Base64 Decoder to confirm it matches your original text exactly.
When Base64 encoding is what you need
Use it when you need to represent text as a Base64 string — embedding a value in a URL-safe way, preparing a payload for an API that expects Base64, or encoding text for storage in a format that doesn't handle raw Unicode well.
Who encodes text to Base64
Developers preparing API payloads
Encode a text value into Base64 for an API or protocol that expects it in that format.
Anyone working with international text
Encode names, messages, or content containing non-Latin characters correctly.
Students learning about encoding
See how text becomes a Base64 string and back again.
Developers debugging encoding issues
Confirm what a specific piece of text should look like once Base64-encoded.
What this encoder handles
Correct Unicode handling
Uses encodeURIComponent before btoa, so emoji and non-Latin characters encode without corruption.
Instant encoding
Output updates as you type, no button needed.
Copy-ready output
The encoded string is ready to paste directly where you need it.
Runs entirely client-side
Nothing you type is sent to a server.
Encoding text step by step
- 1Type or paste the text you want to encode.
- 2Read the Base64-encoded result as it updates automatically.
- 3Copy the output.
- 4Paste it wherever the Base64-encoded value is needed.
Where Base64 encoding gets used
Encoding a text value into Base64 for an API or protocol that expects it in that format.
Encoding names, messages, or content containing non-Latin characters correctly.
Learning how text becomes a Base64 string and back again.
Confirming what a specific piece of text should look like once Base64-encoded.
Where your text goes
Encoding happens directly in your browser using btoa — nothing you type is sent to a server.
Using the output correctly
- Remember Base64 is reversible encoding, not encryption — don't use it to hide sensitive data.
- Test with non-Latin or emoji text if you're unsure whether your use case needs proper Unicode handling.
- Use Base64 Decoder afterward to confirm the encoded string decodes back to your original text.
- Check the destination system's expected Base64 variant (standard vs URL-safe) if the output isn't accepted directly.
Base64 encoding mistakes to avoid
Treating Base64 as encryption
It's a reversible encoding scheme, not a security measure — anyone can decode it back to the original text.
Assuming a naive encoder would work the same way
A plain btoa() call without Unicode handling breaks on emoji and non-Latin characters — this encoder specifically avoids that.
Not checking for a URL-safe variant requirement
Some systems expect URL-safe Base64 (with - and _ instead of + and /), which this standard encoder doesn't produce.
Encoding sensitive data assuming it's protected
Base64-encoded text is trivially decoded by anyone — it provides no confidentiality.
Base64 is encoding, not encryption
Base64 Encoder handles the common case of encoding text, including Unicode, correctly and instantly. Remember it's an encoding format for representing data, not a way to secure or hide it.
Need hands-on help?
Get help with documents, SEO, content, or website fixes
Use this tool for quick work. If you need a real file prepared, a page reviewed, or a website issue fixed, send the URL and describe the problem.
FAQ
Base64 Encoder FAQ
Answers for using Base64 Encoder on I Love Tool XYZ.
Is Base64 encryption?
No. It's a reversible encoding format, not a security measure — anyone can decode it back to the original text.
Does this produce URL-safe Base64?
No, it produces standard Base64 using + and / characters.
Is my text sent to a server?
No. Encoding happens entirely in your browser.