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Compress PDF for engineers
Updated July 2026
Arthize lets engineering teams compress a PDF in a private workspace — free, with no watermark. Compressing a PDF reduces file size — often 50–90% on image-heavy scans — by down-sampling images and stripping redundant data, while keeping text selectable.
Why engineers compress a PDF
An engineer merges drawings and specs into one submittal, compares two revisions to catch changes, and archives the final set as PDF/A so it stays readable for the project's lifetime.
Built for drawings. Whether it's drawings, specifications, reports, Arthize's compress pdf keeps the work inside your private workspace. Project documents can be commercially sensitive; a private workspace protects designs and client data.
What matters when you compress a PDF
PDF file size almost always comes from embedded images, not text.
Down-sampling scans to a lower DPI usually gets an image-heavy file under 1MB.
Light compression is visually lossless for most documents.
How to compress a PDF
- 1
Open the compress tool
Sign in and open the Compress tool.
- 2
Add your PDF
Upload the oversized file; it is processed privately.
- 3
Pick a compression level
Higher compression down-samples images more; light compression keeps them crisp.
- 4
Download the smaller file
Most image-heavy PDFs drop well under 1MB with no visible quality loss.
Common questions
- How do engineers compress a PDF for free?
- Compressing a PDF reduces file size — often 50–90% on image-heavy scans — by down-sampling images and stripping redundant data, while keeping text selectable. On Arthize it's free with no watermark, and the file is deleted after the job — which is why engineering teams can use it for drawings without a confidentiality risk.
- Is it private to compress a PDF sensitive drawings?
- Yes. Project documents can be commercially sensitive; a private workspace protects designs and client data. Files are processed inside your private Arthize workspace and deleted after the job.
- How do I compress a PDF to under 1MB?
- Compressing a PDF reduces file size — often 50–90% on image-heavy scans — by down-sampling images and stripping redundant data, while keeping text selectable. On Arthize it's free with no watermark and processed privately.
- Will compressing a PDF lose quality?
- Compressing a PDF reduces file size — often 50–90% on image-heavy scans — by down-sampling images and stripping redundant data, while keeping text selectable. On Arthize it's free with no watermark and processed privately.
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