📖 How to Use
Using Base64 Decoder is simple:
- Step 1: Enter or paste the content you want to process
- Step 2: Configure options if available
- Step 3: Click the process button to see instant results
- Step 4: Copy or download your output
All processing is done locally in your browser — no data is uploaded to any server.
❓ Frequently Asked Questions
Can Base64 decode restore the original file?
Yes, Base64 encoding is reversible. Decoding perfectly restores the original data. For text files you get text; for images you can download the image. This tool auto-detects the data format and provides text preview or file download accordingly.
Why is my Base64 decoded result garbled?
Garbled output usually results from: 1) Invalid Base64 input; 2) The original data is binary (images, archives) that can't display as text; 3) Character encoding mismatch (UTF-8 vs GBK). Try the download option for binary data.
Does it support Base64 with padding (=)?
Yes. Standard Base64 uses = padding. Base64URL omits padding. This tool supports both formats and handles padding automatically. Missing padding is auto-corrected when possible.
Can I save decoded data as a file?
Yes. Decoded binary data can be downloaded as a file. The tool preserves the original filename if available, or lets you specify a custom filename and extension.
Is online Base64 decoding safe?
Completely safe. All decoding happens locally in your browser using the Web API's atob() function. Your data is never uploaded to any server. Safe for processing sensitive information.