Base64 Decoder
Base64 Decoder — Decode standard or URL-safe Base64 into UTF-8 text. Work entirely in your browser without sending data away.
From open to done.
Choose your input
Open Base64 Decoder; decode is selected for you.
Make it yours
Enter text, select a file, or paste encoded content.
Take it with you
Convert, then copy text or download the decoded file.
Get a better result.
Base64 is reversible encoding, not encryption. UTF-8 is used so non-English text and emoji can round-trip. URL-safe mode replaces plus and slash with hyphen and underscore. A data URI includes a MIME type before the encoded payload.
Base64 Decoder begins with decode. The text Hello encodes to SGVsbG8=. An image data URI begins with data:image/png;base64, followed by the encoded bytes.
Made for your everyday work
Processed entirely on your device
Free to use, with no signup
Copy or download your result
Works in a modern browser
When this helps
Inspect a payload, embed a small image in a stylesheet, or move binary data through a text-only format. Base64 typically increases binary data size by about one third.
A little more clarity.
What to know before you go.
What does Base64 Decoder set up for me?
Base64 Decoder — Decode standard or URL-safe Base64 into UTF-8 text. Work entirely in your browser without sending data away. The underlying tool remains available through the parent link.
Can I adjust decode?
Yes. The preset is a starting point, and the controls remain editable. Review your result before saving.
When should I use the main base64 encode decode tool?
Use the main tool when you want to start without this preset or choose a different task setting.
Can I decode an image?
Yes. Use File mode and paste a data URI or Base64. Download the decoded bytes.
Is Base64 a secure way to hide secrets?
No. Anyone can decode it. Use encryption when confidentiality is needed.
Useful shortcuts
Open the main Base64 Encode / DecodeYour next useful thing.
JSON Formatter
Format, minify and validate JSON.
Developer toolUUID Generator
Generate UUID v1, v4 or v7, individually or in bulk.
Developer toolText Diff Checker
Compare two versions of text with clear word-level changes.
Text toolUnix Timestamp Converter
Convert Unix seconds or milliseconds to a readable date, or a date to epoch time.
Developer tool