PDF pages can contain very different objects
A digitally created PDF can contain text objects, vector graphics, images, links, annotations and forms. A scanned PDF may contain little more than one image per page.
Compression tools therefore use different strategies. Some optimize existing images and objects, while others render each page to an image and build a new PDF from those rendered pages.
Rasterization changes document behavior
When a page is converted to a flat image, the visible appearance can remain similar while underlying text objects disappear. That means search, copy-and-paste, hyperlinks and screen-reader structure may be lost.
The benefit is that rasterized pages can be easier to compress consistently, especially when the source PDF contains complex or poorly optimized content.
Choose the right trade-off
Use image-based compression when the primary goal is a smaller readable copy and interactive document features are not required. Avoid it when selectable text, forms, accessibility or exact digital structure matters.
Always keep the original. Compression should be treated as producing a new delivery format, not as an irreversible replacement of the source document.
Test functionality before choosing a smaller file
A PDF that looks like a scan can still carry an invisible OCR text layer. Test the original rather than deciding from appearance. Find a distinctive phrase, search for it in a reader and copy a few words into a plain-text editor. A successful copy can still be inaccurate OCR, so compare it with the page.
Pageivo compression renders every page into an image. It does not copy the original text layer, links, forms or accessibility tags into the result, and it does not run OCR afterward. Its three presets change image quality and dimensions, not this structural behavior.
| Requirement | Check on original and result | Decision |
|---|---|---|
| Searchable text | Search a distinctive phrase | Use a structure-preserving tool if required |
| Clickable link | Open the intended destination safely | Image-only output cannot keep the link |
| Fillable form | Verify the actual fields | Do not rasterize a form that must stay editable |
| Readable scan only | Inspect small text and page count | A reviewed image copy may meet this purpose |
Do not confuse selectable with accessible
A selectable text layer does not itself prove correct reading order or accessible tagging. For an accessible submission, follow the recipient’s requirements and test with the appropriate accessibility workflow.
- Write down the features the recipient needs.
- Test those features in the original.
- If any structure is required, retain the original or use a suitable optimizer.
- If a visual copy is sufficient, inspect the final Pageivo download and keep the source.
Use the related Pageivo tool
Make large PDF files easier to share. The operation runs in your browser and does not require an account.