Compress PDF To 400KB
Reduce a PDF to 400KB or less when the destination requires a small file.
Current limit: up to 50 files · 1024 MB per file. Options vary by format.
Processing method varies by format. Check this page's privacy details before uploading sensitive files.
Choose a compression workflow
Start from a file-size goal or a common sharing task, then compare the result before downloading.
Compress PDF to 400KB
Try to reduce a PDF to 400KB or smaller for a form, email attachment, portal, or upload limit.
How to Use
- Choose a PDF file or drag it into the upload area.
- Enter a password only if the PDF requires one to open.
- Start compression to 400KB; the browser tests several image quality and resolution settings.
- Compare the final size and inspect every page before downloading or submitting it.
Best Use Cases
- Government, school, work, or application forms that accept PDFs up to 400KB.
- Email or document portals with a fixed attachment limit.
- Scanned PDFs where page images account for much of the file size.
Output Format
The download remains a PDF, but this target-size workflow rebuilds pages as compressed images. It aims for 400KB or less and returns the best available result when the target cannot be reached. Selectable text, links, forms, bookmarks, annotations, and accessibility structure may not be preserved.
Privacy
Target-size processing runs in the browser after the PDF libraries load. The document is not sent to a compression API by this workflow. Do not process confidential or third-party files unless you are authorized to do so.
FAQ
Will the PDF always be smaller than 400KB?
The tool tries several settings and reports the best available result. Complex or image-heavy PDFs may not reach the target without a substantial quality tradeoff, so inspect the actual output size.
Will selectable text and forms remain available?
Not necessarily. Because the target-size workflow may rebuild pages as images, searchable text, links, forms, bookmarks, annotations, and accessibility features can be lost.
What should I do if the target is not reached?
Try a larger target, simplify the source PDF, remove unnecessary pages before compression, or use the regular PDF compressor when preserving document structure is more important.