Worked example
For web previews, use JPG at 150 DPI. For printing or recognizing small text, try PNG at 300 DPI. A 10-page PDF produces 10 images in one ZIP.
Understanding settings and results
- DPI sets the rendered pixel count. Higher DPI renders vector text more finely but cannot recover lost scan detail, and increases file size and processing time.
- JPG suits photos; PNG suits line art, tables and sharp text.
Scope and limitations
- Pages are rasterized. Images do not retain searchable text layers or PDF links.
- 600 DPI uses substantial memory on large pages and is unnecessary for ordinary screen viewing.
Troubleshooting
- Lower DPI or choose JPG when images are too large.
- Color differences may come from a special PDF color space. Try converting to an RGB PDF in a standard reader first.
Privacy and processing
The server renders the source PDF. Outputs become eligible for cleanup after about 30–60 minutes; download and save the ZIP promptly.