Compress Images in PDF

Drag it into the drop zone or click to browse. The tool shows images found, file size, and average resolution.

Choose Balanced to start, or Low/High, and fine-tune with the Image Quality slider while watching the estimated size.

Leave Convert PNG to JPG on for smaller photos, switch on Grayscale Images for colour scans you don't need in colour, and set Apply To (all images or only those over 500KB).

Click Compress Images, then Download PDF.

Upload the PDF, pick a Compression Level (or use the quality slider), set any extra options, and click Compress Images, then Download PDF. The tool re-encodes the embedded images at a smaller size while leaving the text alone. A live estimate shows the new size before you commit, and everything runs in your browser.

This tool compresses only the embedded images, so the text and vector graphics stay completely sharp. Compress PDF is a broader, whole-document optimizer that can also re-process page structure. Use this one when keeping the typography pristine matters; use Compress PDF for a general one-click size reduction.

Yes — that's the point. The tool targets the image objects in the PDF and never rasterizes or re-renders the text, so fonts stay crisp, selectable, and searchable no matter how hard you compress the images. Only the photos and scans lose resolution, and only as much as you choose.

The presets set how aggressively images are compressed — Low keeps the most detail, High squeezes hardest, and Balanced sits in between. The Image Quality slider gives finer control over the same trade-off. Watch the live estimated size as you adjust to find the sweet spot between size and clarity.

PNG is lossless and often much larger than needed for photos. Turning on Convert PNG to JPG re-encodes those images as JPEGs, which are far smaller, with little visible difference for photographic content. It's a quick way to cut size; leave it off if you specifically need PNG transparency preserved.

It removes the colour from embedded images, which roughly halves their data. It's ideal for scanned documents that are essentially black text on white — you keep readability while cutting size. Leave it off for anything where colour matters, like product photos or charts.

Yes. Set Apply To to Images > 500KB so only the heavy graphics are compressed and small logos or icons are left untouched. This targets the parts of the file that actually cause the bloat, often giving most of the savings with minimal visible change.

It depends on how image-heavy the file is and your settings, but image-dense PDFs often drop by half or more. The tool shows a live Estimated Size and saving percentage as you change the quality and options, so you can see the result before you compress and download.

No. The compression runs entirely in your browser, so the PDF never leaves your device or reaches a server. That matters for financial reports, contracts, and scans. Closing the tab clears the file from memory.

Yes. The tool works in any modern browser on iPhone or Android — no app needed. Upload, choose a level, and download. A large, image-heavy PDF uses more memory, so it processes faster on a laptop than on an older phone.

Yes. Compressing is free, the result has no watermark, and there's no account to create. Choose your settings and download a lighter PDF — no paywall before the download.

Lower the Image Quality slider further (around 40% is aggressive but effective), switch on Grayscale Images for text-heavy scans, and make sure Convert PNG to JPG is on. If the images aren't needed at all, Remove Images from PDF gives the biggest cut; for a whole-file pass, try Compress PDF.