Use PDF File Size Inspector
- You need to diagnose file size before uploading.
- You want browser-local inspection first.
- You need to decide whether pages, images, or metadata are the likely source.
Tool comparison
PDF Size Inspector vs Compress PDF
PDF size inspection explains why a file may be large. Compress PDF rewrites the file and should be used after the packet is otherwise final.
Decision
Which one fits the task?
Use Compress PDF
- A portal or email limit rejects the final PDF.
- Temporary upload-backed compression is acceptable.
- You are ready to review a rewritten output file.
Avoid
Common mistake
Do not compress repeatedly or before deleting extra pages. Compression is a final-copy step, not a substitute for packet cleanup.
Quality
Review before you finish
Quality notes
- Already optimized PDFs may not shrink.
- Image-heavy PDFs can shrink but may lose quality.
- Metadata cleanup and compression solve different problems.
Next steps
- Inspect size drivers first.
- Remove or reorganize unnecessary pages before compression.
- After compression, verify the output visually and with checksum or size checks.
Tools