How to use this comparison
Learn what makes a good PDF compressor online and how to choose the right output size for forms, email, WhatsApp, resumes, and scanned PDFs.
What to compare
Target size options
A useful compressor should support practical targets such as 100KB, 200KB, 500KB, and 1MB.
Readable output
Compression should reduce size while keeping text, stamps, photos, and signatures readable.
Preview and download clarity
The workflow should make it clear what file you are downloading.
Related tools
Sometimes removing pages or converting images properly reduces size more safely than extreme compression.
PDF task comparison
Start with the task you need to complete, then choose the matching FilesDoctor workflow.
| Need | FilesDoctor workflow | Best use |
|---|---|---|
| Text-based PDF | Light or medium compression | Usually keeps text sharp. |
| Resume PDF | Moderate compression | Check formatting and links. |
| Scanned certificate | Careful compression | Use a larger allowed size when possible. |
| Photo-heavy PDF | Reduce image size first if possible | Check clarity after export. |
| Government form file | Exact portal limit | Use official instructions as the final rule. |
Start with these FilesDoctor tools
These tools cover the most common browser-based PDF tasks.
Related guides
Read these practical guides before preparing an important document.
FAQ
Which PDF compressor should I use?
Use a compressor that lets you choose a realistic target size and check the downloaded result.
Can a PDF always be compressed to 100KB?
Not always. Very small targets can make scanned or image-heavy PDFs unreadable.
What is a safe target for scanned PDFs?
If the portal allows it, 500KB or 1MB is often safer for scans than 100KB.
Should I remove pages before compression?
Yes, removing blank or unnecessary pages can reduce size without lowering quality.
Final checklist before you choose a tool
- Confirm the file type and size requirement.
- Choose the tool based on the job: compress, merge, split, convert, OCR, or protect.
- Open the downloaded file and verify output quality.
- Keep your original document unchanged.