Compress PDF to 1MB

How to use Compress PDF to 1 MB

1. 1

   Click "Choose a PDF" and pick your file. The target is already set to 1 MB; change it if your portal gives a different limit.

2. 2

   Tick "Convert images to grayscale" for scanned black-and-white documents, then click "Compress PDF".

3. 3

   Check the green "Under 1 MB" message and the new size, then click "Download compressed PDF".

When to use Compress PDF to 1 MB

• HR and onboarding portals. Offer letters, relieving letters and payslips often must be under 1MB.
• Email. Smaller attachments send faster and do not fill the recipient's mailbox.
• Insurance and loan claims. Hospital bills and reports for online claim forms.

What fits in 1MB

1MB holds a lot: a 20 to 30 page scanned document in grayscale, or a long digital report with charts and photos in colour. Most PDFs only need light image compression to get under 1MB, so quality stays high.

If the PDF will not go under 1 MB

• Split it: use Split PDF to upload the pages as separate files, or remove pages the form does not need.
• Rescan at a lower resolution: 150 DPI in grayscale is enough for most text documents.
• Photograph each page and use JPG to PDF with a maximum PDF size, which handles phone photos well.
• Use grayscale: colour scans of black-and-white pages are often three times larger than they need to be.

Limits and privacy

• First the tool recompresses the images inside the PDF and keeps the text selectable. Only if that is not enough does it turn pages into images (you can switch this off).
• Target: email attachments and HR portals that limit files to 1MB.
• One PDF at a time, up to 200MB. Password-protected PDFs need to be unlocked first.
• PDFs are processed in your browser with pdf-lib and pdf.js, which are served from this site. Your file is not sent to a server, and nothing is kept after you close the page.

Frequently asked questions

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