Troubleshooting

Educational guides for common developer errors — linked to tools and glossary articles.

• Unexpected Token in JSON

  Fix 'Unexpected token' JSON errors — trailing commas, single quotes, comments, and invalid syntax with line-level tips.

• Invalid JWT Format

  Fix invalid JWT format errors — missing segments, bad Base64URL encoding, and malformed header or payload.

• Base64 Decode Failed

  Fix Base64 decode errors — wrong alphabet, padding, URL-safe vs standard Base64, and invalid characters.

• Invalid YAML Indentation

  Fix YAML indentation errors — spaces vs tabs, inconsistent nesting, and mapping/list alignment.

• Regex Invalid Capture Group

  Fix invalid regex group errors — unclosed parentheses, invalid group names, and lookaround syntax mistakes.

• PDF File Too Large

  Fix PDF files that are too large to process in the browser — split, compress, and memory tips.

• PDF Upload Failed

  Troubleshoot PDF upload and read errors in browser PDF tools — encryption, corruption, and format issues.

• Unsupported Image Format

  Fix unsupported image format errors — convert HEIC, TIFF, or BMP to JPG, PNG, or WebP in the browser.

• Blurry Image After Compression

  Why compressed images look blurry and how to fix quality settings when optimizing images.