Example Walkthrough
Raw Base64 image input
Input: iVBORw0KGgoAAAANSUhEUgAA... (raw Base64)
Action: Decode in Image workspace, verify MIME and regenerate with correct prefix.
Output: Select image mode, decode, then preview
Troubleshoot Base64 Decode Failures
When decoding fails or previews do not render, this page helps isolate input format, prefix, and data integrity problems quickly.
Suitable Input Types
- Error-prone Base64 copied from logs, docs, or API responses
- Data URL strings with unknown or suspicious MIME prefixes
- Image Base64 blocks that fail to preview after decoding
Step-by-Step Workflow
- Confirm whether input is plain Base64 or Data URL and select matching mode.
- Decode once and inspect result; switch workspace if content type is mismatched.
- Fix prefix/padding/characters, then re-run until output and preview are stable.
Common Issues in This Scenario
Invalid characters from rich-text copy
Pasting from chat or docs may inject punctuation and invisible characters. Recopy as plain text.
Wrong MIME causes blank preview
When MIME is incorrect, browser may reject rendering. Choose the right image type manually if needed.
Truncated payload
If source string was cut off, decode may succeed partially but output is corrupted. Compare against original length.