Round-trip text and Base64
Encode plain text instantly or turn incoming Base64 back into readable text.
Text → Base64
Base64 → Text
File ↔ Base64
Drop any file to convert it into Base64 immediately.
Base64 Encoder/Decoder
🔒 Browser-side processing
Encode and decode Base64 strings, URL-safe Base64, and files directly in the browser.
Overview
Handle Base64 encoding and decoding in one place
This page is built for the moments when you need to inspect a value immediately: API payloads, data URLs, token fragments, or Base64 strings copied from logs. Text conversion and file conversion live together so you can decode, inspect, and export without switching tools.
Inspect file payloads
Drop a local file to convert it into Base64, then export Base64 back into a file when you need the original bytes again.
Debug transport issues
Use URL-safe and whitespace cleanup options to tell the difference between a broken value and a broken delivery path.
More: how to use it, examples, and common errors
Guide
The Base64 details people most often trip over
Base64 is not encryption
It only changes representation. Anyone can decode it again, so it should never be treated as a security layer.
Why URL-safe matters
When values travel through query strings, callbacks, or tokens, URL-safe output avoids reserved characters that often break transport.
Whitespace is a real issue
Base64 copied from logs, documents, or emails often contains line breaks and spaces, which is why cleanup options help before decoding.
How To
The fastest way to use this page
When you need to decode text
- Paste the incoming Base64 value into the decode input.
- Turn on whitespace cleanup if the value came from logs, docs, or email.
- Enable URL-safe restore when you see
-and_in the payload. - Inspect the readable output, then copy it or send it to the next tool.
When you need Base64 from a file
- Drop a local file into the upload area.
- Use URL-safe output only if the value will travel through URLs or tokens.
- Copy the resulting string into test payloads, data URLs, or API fixtures.
- When you receive Base64 back, set a filename and export the decoded bytes again.
Advanced Options
When each option actually helps
URL-safe output
Use this when standard Base64 characters such as +, /, and = are likely to break in query strings,
callback URLs, or compact tokens.
Whitespace cleanup
Turn it on when the payload came from logs, docs, or multiline email content. It quickly tells you whether the value is invalid or the copy step is the real problem.
Custom download filename
Naming the decoded result up front makes it easier to keep track of fixtures and test outputs, especially when you export many files in one debugging session.
Examples
Two quick examples that make the workflow obvious
Text encoding example
Simple strings become easy test fixtures when you need a Base64 payload right now.
Hello, world! → SGVsbG8sIHdvcmxkIQ==
URL-safe example
When a Base64 value must travel inside a URL or token, the URL-safe variant avoids reserved characters.
standard: aGVsbG8rLz0= url-safe: aGVsbG8rLz0
Use Cases
When this page is especially handy
Inspect encoded API payloads
Useful for response bodies, image data URLs, or embedded file fields that arrive in Base64 form.
Create quick file samples
Dropping a file into the page gives you a copyable Base64 string without using a separate desktop tool.
Check transport overhead
Base64 expands payload size, so it is worth checking before sending values through channels with strict limits.
FAQ
Common questions that come up with Base64
Is Base64 a security layer?
No. It changes representation, but anyone can decode it again. Sensitive data still needs real encryption and proper access control.
Why is the output longer than the original?
Base64 turns every 3 bytes into 4 printable characters, which makes transport easier but increases size by roughly one third.
What if the decoded text looks broken?
The payload may be invalid, or it may not be text at all. In that case, exporting the value as a file is often the fastest way to inspect the real bytes.
Which tools pair well with this one?
Use the URL tool for query-safe values, the Image Base64 page for data URLs, and JSON Formatter when the Base64 field sits inside an API response.