Does this handle emoji and non-Latin text correctly?
Yes, as long as the string was encoded with similar Unicode-safe handling — this decoder correctly restores those characters.
Developer Tools
Decode Base64 Back to Text
Decode a Base64 string back into readable text, including Unicode characters, right in your browser.
Why Unicode text decodes correctly here
This decoder runs atob on your input, then passes the result through decodeURIComponent (with escape) to correctly restore Unicode characters — emoji, accented letters, non-Latin scripts — that a plain atob() alone would render as garbled text. It's the exact reverse of this site's Base64 Encoder, so a string encoded there decodes back here to precisely the original text.
If the string you're decoding wasn't produced with this same Unicode-safe encoding approach, decoding it may still work for plain ASCII text but could produce unexpected results for anything containing special characters.
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
Make sure you've copied the complete Base64 string, with no stray whitespace or missing characters.
After
Check the decoded text for garbled special characters, which usually points to how the original string was encoded.
When you need to decode a Base64 string
Use it whenever you have a Base64 string — from an API response, a config file, or a stored value — and need to see its actual text content.
Who decodes Base64 strings
Developers debugging API data
Decode a Base64-encoded field to confirm what text it actually contains.
Support engineers
Decode a Base64 string from a bug report or log to read its content.
Anyone verifying an encoding round-trip
Confirm a string encoded elsewhere decodes back to the expected text.
Students learning about encoding
See how a Base64 string translates back into readable text.
What this decoder handles
Correct Unicode handling
Uses decodeURIComponent after atob, correctly restoring emoji and non-Latin characters.
Instant decoding
Output updates as you type or paste, no button needed.
Matches this site's encoder exactly
A string encoded with Base64 Encoder here decodes back to the exact original text.
Runs entirely client-side
Nothing you paste is sent to a server.
Decoding a string step by step
- 1Paste the Base64 string you want to decode.
- 2Read the decoded text as it updates automatically.
- 3Check the result looks correct, especially for any special characters.
- 4Copy the decoded text if you need it elsewhere.
Where Base64 decoding gets used
Decoding a Base64-encoded field to confirm what text it actually contains.
Decoding a Base64 string from a bug report or log to read its content.
Confirming a string encoded elsewhere decodes back to the expected text.
Learning how a Base64 string translates back into readable text.
Where your string goes
Decoding happens directly in your browser using atob — nothing you paste is sent to a server.
Getting a clean decode
- Paste the complete Base64 string — a truncated string will fail to decode or produce garbled output.
- If special characters look wrong, check whether the string was encoded with proper Unicode handling in the first place.
- Use this alongside Base64 Encoder to confirm a full round-trip produces the original text.
- Remove any surrounding whitespace or line breaks from a copied Base64 string before pasting.
Base64 decoding mistakes to avoid
Pasting a truncated string
An incomplete Base64 string will fail to decode correctly or throw an error.
Assuming any garbled text means this tool is broken
If the original encoding didn't handle Unicode properly, decoding here can still show garbled characters — the issue is upstream.
Including extra whitespace or line breaks
Copied Base64 strings sometimes pick up stray characters that break decoding — clean the string first.
Expecting this to decode a URL-safe variant
This decoder expects standard Base64 characters (+ and /), not the URL-safe variant (- and _).
If the decoded text looks garbled
Base64 Decoder reverses this site's Base64 Encoder exactly, correctly restoring Unicode text along the way. If a decoded result looks garbled, the most likely cause is how the string was originally encoded, not this tool.
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 Decoder FAQ
Answers for using Base64 Decoder on I Love Tool XYZ.
What if the decoded text looks garbled?
This usually means the original string wasn't encoded with proper Unicode handling, rather than a problem with this decoder.
Does this decode URL-safe Base64?
No, it expects standard Base64 characters (+ and /), not the URL-safe variant.
Is my string sent to a server?
No. Decoding happens entirely in your browser.