Compress JPG to PDF
Make JPG-based PDFs smaller without sacrificing readability.
Who this guide is for
This guide is for users who need smaller PDF files for email, upload forms, or messaging limits. It focuses on reducing size while keeping text and document details readable.
Step-by-step workflow
- Add your images and choose Single PDF if you need one upload-ready file.
- Start with 144 DPI and medium-high compression as a baseline.
- Enable Strip metadata to remove non-essential camera data.
- Export, check file size, then fine-tune only one setting at a time.
Recommended settings
- Under 5 MB target: 120 to 144 DPI with medium-high compression.
- Under 10 MB target: 144 to 180 DPI with medium compression.
- Keep text readable: lower compression first before changing DPI too aggressively.
Common mistakes to avoid
- Reducing DPI and quality simultaneously too far in one pass.
- Trying to hit an exact size without checking readability after each export.
- Using Fill on documents where edges may contain important details.
Practical tip
If a portal rejects your file, aim slightly below the limit (for example 9.5 MB for a 10 MB cap) because some systems add overhead during upload.
Compression is not the same as shrinking blindly
Compression removes visual detail to reduce file size. Used carefully, it makes a PDF easier to send without changing the meaning of the document. Used too aggressively, it creates blocky text, noisy backgrounds, and unreadable receipts. The goal is the smallest file that still passes a real readability check.
Compression workflow
- Export a two-page sample with the default or medium setting.
- Check file size and readability.
- If the file is too large, increase compression one step.
- If text becomes rough, raise DPI slightly or reduce compression.
- Once the sample works, apply the same settings to the full batch.
What compresses well
Clean photos with simple backgrounds often compress well. Receipts on a plain table compress better than receipts photographed on a textured surface. Screenshots with text may not tolerate high compression because sharp edges turn into artifacts. If the source image contains lots of shadows or grain, retaking the photo can reduce size more effectively than forcing compression.
Best pairing with DPI
Compression and DPI work together. Lowering DPI reduces the amount of data before compression runs. Increasing compression discards more detail from the remaining data. Try lowering DPI from 200 to 144 before pushing compression to the maximum; the result is often more readable.
Compression examples
A photographed receipt bundle usually benefits from 144 DPI plus medium-high compression because the important information is text and totals, not fine photographic detail. A screenshot-heavy PDF often needs 180 DPI and moderate compression because sharp UI text can break down quickly. A print-focused photo PDF should use less compression even if the file becomes larger.
When compression is the wrong fix
If a PDF is enormous because the source photos include large backgrounds, compression is only a partial fix. Retake or crop the images so the document fills the frame. If the PDF is huge because there are too many pages, split the document. If it is huge because the source is PNG screenshots, use the format guide to choose settings that preserve text without overbuilding the file.
Related help
Reviewed on April 29, 2026 by JPEGtoPDF.io. See About, Editorial Policy, and Privacy.