Base64 Decoder
Decode Base64 to text online. Supports URL-safe variants and shows hex when data is not UTF-8.
Base64 Decoder
Free online tool · instant results
Base64 Decoder workspace
Output
No output yet
Paste Base64 and decode.
What it does
Decode Base64 to text online. Supports URL-safe variants and shows hex when data is not UT...
Best for
Decode Base64 to text online. Supports URL-safe variants and shows hex w...
Time
~1 min to complete
Pricing
Free forever
Access
No signup required
Privacy
Runs in your browser
Overview
About this tool
A clear look at what this tool is for and why people use it.
Base64 Decoder
Decode Base64 to text online. Supports URL-safe variants and shows hex when data is not UTF-8.
Decoding is free and private.
Why use it
Benefits
Everything you need for a fast, confident answer — nothing you don’t.
Runs in your browser session
input is not stored by this tool
Copy results with one click
Copy results with one click
Clear validation and readable output
Clear validation and readable output
Free to use without signup
Free to use without signup
Walkthrough
How to use
Simple steps from empty form to a result you can use.
-
1
Enter or paste your input in the workspace.
-
2
Choose options if available, then run the tool.
-
3
Review the output and copy what you need.
-
4
Reset clears the workspace for another run.
Worked samples
Examples
Real-world scenarios so you can match the math to your situation.
Standard
- SGVsbG8
- → Hello
Whitespace
Spaces and line breaks in Base64 input are ignored.
Under the hood
How it works
Follow the path from input to output — transparent and easy to scan.
Whitespace is stripped, optional
Whitespace is stripped, optional URL-safe alphabet is normalized to standard Base64, then base64_decode runs in strict mode.
Calculation
• Valid UTF-8 is shown as text.
• Other byte sequences
• Other byte sequences are displayed as hex with a note.
Pro tips
Tips
Small habits that make this tool even more useful day to day.
Get accurate results
Double-check units and inputs before you rely on Base64 Decoder output for anything important.
Work faster
Use the examples below as a starting point, then tweak values to match your scenario.
On any device
This tool is mobile-friendly — bookmark the page so you can reopen it in one tap.
Watch out
Common mistakes
Avoid these slip-ups so your result is ready the first time.
Leaving required fields blank
Enter every value the workspace asks for before calculating — empty fields usually block a result.
Using invalid numbers
Avoid negative values or percentages outside a valid range unless the tool explicitly allows them.
Mixing up units
Keep units consistent (currency, length, weight, time) so the formula returns a meaningful answer.
FAQ
Frequently asked questions
Straight answers to the questions people ask most.
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