SmartActions.Embed an image in CSS or HTML
Encode a file as a Data URL without uploading it anywhere.
Base64 Encoder & Decoder
Convert UTF-8 text and files to and from Base64, entirely on your device.
5 credits / successful runRuns on your deviceSign-in to runResult not retained
Input
Local processingPasted input up to 5 MB. Standard and URL-safe alphabets are explicit; missing padding and line breaks are accepted. Invalid input is rejected before charging.
Result
Text or files, encoded locally.
Preview a built-in sample for free. Results from your input appear only after credit settlement is confirmed.
Results are not saved. Download before leaving. Base64 is an encoding, not encryption.
Your content stays in your browser. Only execution authorization and credit activity are sent to our service. Results are not saved and cannot be restored after leaving this page.
WHAT YOU’LL GETYour data.
Your data.
Your device.
Base64 Encoder & Decoder, made simple.
Standard or URL-safe Base64, UTF-8 text, or a byte-for-byte decoded file, with clear validation errors.
Choose Text → Base64, Base64 → text, File → Base64 or Base64 → file. Each successful action costs 5 credits. Copy and download the same result without another charge. Files are processed in chunks and never uploaded.
WHEN TO USE IT
What people use Base64 Encoder & Decoder for.
Inspect encoded data
Decode a Base64 blob from a config file, an API payload or an email header.
Move binary through a text channel
Encode a file, paste it somewhere that only accepts text, and decode it back byte for byte.
How to use Base64 Encoder & Decoder
- Choose a direction: text or file to Base64, or Base64 back to text or a file.
- Pick the standard or URL-safe alphabet to match your data.
- Run the conversion; large output is available as a download.
- Remember that Base64 is encoding, not encryption — it protects nothing.
A FEW THINGS TO KNOW
Questions? We’ve got answers.
What can this tool convert?
UTF-8 text and files to Base64, and Base64 back to text or downloadable bytes. Standard and URL-safe alphabets are supported. Standard encoding can include a Data URL prefix.
Are my files uploaded?
No. Files, names and content remain in your browser. The service receives only operation options and authorization metadata for credit settlement.
What does each action cost?
Each successful encoding or decoding action costs 5 credits. Input validation and the fixed sample preview are free. Copying and downloading the same result cost nothing extra.
What are the size limits?
Pasted input supports 5 MB. Files to encode support 50 MB, encoded text files support 70 MB, and decoded output supports 50 MB. Large output is available as a full download; only the first 64K characters are displayed.
Why did text decoding fail?
The data may use a different alphabet, have incorrect padding, or contain binary bytes rather than valid UTF-8. Choose the matching alphabet or Base64 → file. Base64 is not encryption.
What happens on a connection failure?
Check the original run before trying again. Failed or cancelled runs release their credits. Abandoned reservations expire after five minutes and are released on the next account request. Download results before leaving; they are not saved.