Compress a PDF to under 1 MB
Shrink any PDF below a 1 MB email or upload limit, entirely in your browser. No account, no watermarks, no server storage.
Compress a PDF to under 1 MB
Many upload forms — government portals, university LMS, HR systems — cap PDF attachments at 1 MB. This preset opens the PDF compressor in max-savings mode: embedded images are re-encoded at lower quality, fonts are subset-stripped, and unused objects are removed. Most 5–20 MB documents land under 1 MB in a single pass. Scanned PDFs benefit most; text-only PDFs gain less because there's little fat to trim.
What is Compress a PDF to under 1 MB?
Shrink PDF file size with structural compression — object-stream packing and unused-resource cleanup. Typical savings are 10-30% on text-heavy PDFs; image-heavy scans see smaller gains because the embedded images themselves are not recompressed (a feature planned for a future server-side pass). Use when you need to fit a PDF under an email or upload size limit without switching to a different file format.
How do I use Compress a PDF to under 1 MB?
- Drop a PDF onto the upload zone.
- Click Compress.
- The panel shows the size saving percentage.
- Click Download to save the compressed PDF.
Compress a PDF to under 1 MB by the numbers
- Engine
- pdf-lib, in-browser
- Max file size
- 100 MB
- Typical savings
- 10–70%
- Processing time
- ~1–8 seconds / file
- Privacy
- File never leaves browser
Common use cases for Compress a PDF to under 1 MB
- Shrinking a scanned contract below a 5 MB email attachment limit.
- Preparing a portfolio PDF that needs to load quickly on a slow mobile connection.
- Cutting down a 40 MB e-book to fit a university LMS upload quota.
- Compressing a report with dozens of embedded photos before sharing in Slack.
- Batch-optimising invoices before archiving to a customer drive.
Common pitfalls and how to avoid them
- Text-only PDFs barely shrink — Most text PDFs are already near-optimal. Try removing unused fonts and images if you need further savings — or use a different source generator.
- Scanned PDFs stay large — Scanned pages are really images. For scans, rasterise to JPG with PDF-to-JPG, compress with Image Compressor, then rebuild with Image-to-PDF.
- Compressed text looks fuzzy — You compressed the embedded images too aggressively. Retry at a higher quality setting (75–85%) and re-download.
When should I use Compress a PDF to under 1 MB?
PDF Compressor is best for text-heavy PDFs. For image-heavy scans, compressing the images first with Image Compressor, then rebuilding with Image to PDF, often saves more than running the scan through PDF Compressor directly.
My PDF is still over 1 MB. What now?
Text-heavy PDFs with no images have little compressible fat. Try splitting the document with PDF Splitter and sending parts separately.
Will the quality degrade noticeably?
Body text stays crisp. Embedded photos drop to ~60% JPG quality, so large photos may show mild softness on zoom. For photo-heavy PDFs, consider a 2 MB target instead.
Does this work on scanned PDFs?
Yes, and scans benefit the most — they're essentially embedded images, which is exactly what the compressor targets.
Is my file uploaded anywhere?
No. Everything runs in your browser — the file never leaves your device, and there is no server component for this tool.