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ZIYNU

PDF Doctor

Find and fix common PDF problems automatically.

Not sure what your PDF needs? PDF Doctor checks it for the problems that most often cause rejected uploads, messy prints and privacy leaks, explains each one in plain language, and fixes the ones that can be fixed safely.

How to use

  1. Choose your PDF.
  2. Wait a few seconds while every page is checked.
  3. Read the health report — each finding says what it means.
  4. Apply a single fix or “Fix everything”, then download the fixed copy.

What PDF Doctor checks

File size, page count, PDF version and encryption; page sizes and rotation; blank pages; the effective resolution (DPI) of every image; whether fonts are embedded; metadata such as the author's name; and hidden content such as JavaScript, attached files, annotations and form fields. It also notes pages without selectable text and whether the document is tagged for accessibility.

Every check runs on your device. If a check can't be completed for a particular file, the report doesn't claim it passed.

About the health score

The score out of 100 is a guide that summarises the findings — problems cost more points than warnings. It isn't an official standard; a document can score lower simply because it has metadata you might want to keep.

Good to know

  • Fixes always create a new file; your original is untouched.
  • “Fix everything” never compresses automatically, because compression can turn text into images.

Frequently asked questions

Is my PDF uploaded to a server?

No. ZIYNU's PDF tools run in your browser using your device's processor. The file is opened locally and the result is created on your device, so documents such as CNIC scans, degrees and contracts never leave it.

Can PDF Doctor repair a damaged PDF?

If the file opens, PDF Doctor can rebuild a clean copy with its fixes. Files too damaged to open need a repair tool, which is planned.

What does “low-resolution image” mean?

An image with fewer than 150 pixels per inch at the size it's printed. It looks fine on screen but may print blurry.

Why won't my password-protected PDF work?

Encrypted PDFs can be read but not changed without removing the protection. Open the file in the software that created it, remove the password or restrictions, save it, and try again.