Enter Base64
Paste standard Base64 or a Data URL, or load a text file.
FREE BASE64 DECODER
Free Base64 Decoder
Restore a Base64 string as readable text or the original file bytes.
Your input and result are never uploaded or stored.
- 1Enter data
- 2Convert in browser
- 3Use result
1 · Enter data
Enter Base64 to decode
Paste a string or load a Base64 text file.
No file selected.
2 · Convert in browser
Validate and restore the input
Base64 is not encryption and does not protect passwords or secret data.
Processing Base64 in your browser…
3 · Use result
Decoded result
Valid UTF-8 appears as text; binary data remains available as a file.
FREE BASE64 DECODER
Decode Base64 to text or a file online free
Strictly validate the standard format and restore the original bytes in your browser.Validate input
Check alphabet, length, padding, and the 10 MB result limit.
Use the result
Copy valid UTF-8 text and download every result as a file.
LOCAL BASE64 TOOL
Your text and files stay on your device
Only the conversion runs in a separate browser thread.
No server upload
Input and output stay only in browser memory.
Web Worker
Conversion runs away from the main interface.
RFC 4648
Uses the standard Base64 alphabet and padding.
FREE BASE64 DECODER FAQ
Base64 decoder FAQ
Review formats, privacy, downloads, and limits.1Can I decode Base64 with line breaks?
Yes. Spaces, tabs, and line breaks are removed before standard Base64 validation.
2Can it restore an image or PDF?
Yes. A Data URL uses its MIME extension; raw Base64 is downloaded safely as a BIN file.
3Why is some output not shown as text?
If the bytes are not valid UTF-8, the tool avoids damaged characters and offers the binary download instead.
4Does Base64 protect secret information?
No. Anyone can decode it, so Base64 must not be treated as encryption or privacy protection.