How the size target works
The tool first rebuilds selected pages without reducing quality. If that result exceeds 4 MB, pages are converted to compressed images until the PDF fits below the target.
Compress PDF Under 4 MB
Select and reorder the pages you need, then create a PDF below 4 MB. Processing happens locally, so the document is not uploaded to our server.
Target size: below 4 MBChoose a PDF to begin.
Choose a PDF to preview its pages
Select pages and arrange them before compression.
Pages to compress
Click previews to select or deselect pages. Drag cards or use Earlier and Later to set the output order.
What may change
Image-based compression can flatten selectable text, links, forms, layers, signatures, bookmarks, and other interactive PDF features.
Review the result
Open the downloaded PDF and check text clarity, page order, orientation, total pages, and final file size before submitting or sharing it.
PDF size reduction guide
A strict file-size target often requires a tradeoff between visual clarity and document features. This tool preserves the original page data when possible and uses image-based compression only when required.
Best uses
- Meet a 4 MB application or upload limit.
- Reduce a scanned packet before emailing it.
- Keep only required pages and place them in the correct order.
Quality checks
- Confirm the downloaded file is below 4 MB.
- Zoom in and check small text for readability.
- Verify page order and all required content before submission.
Common mistakes
- Assuming signatures or forms survive image-based compression.
- Compressing the only copy of an important document.
- Submitting the result without checking readability.
Why some PDFs compress more than others
Scanned pages and photo-heavy PDFs usually offer the largest reduction because their images can be resized and recompressed. A short text PDF may already be compact, while a document containing embedded fonts, forms, or attachments can have overhead that is difficult to reduce without changing features.
Meeting a strict upload limit
The tool verifies the generated file size and uses a conservative image budget when a stronger reduction is needed. If a very long document still cannot reach 4 MB while remaining readable, select only the required pages or split the document into accepted sections rather than making small text unusable.
Quick answers
Will the result always be below 4 MB?
The tool budgets page images conservatively and verifies the final size before download. Extremely long documents may require selecting fewer pages.
Is my PDF uploaded?
No. Reading, page selection, reordering, and compression happen locally in your browser.