How to Convert PDF to JPG in High Resolution
Resolution is set when the page is rendered, so pick it before converting. Here is how in common tools:
This page (online)
Upload the PDF and download the JPG. The converter renders the first page at 200 DPI and saves it at JPEG quality 92: an A4 page becomes 1654 × 2339 px, a US Letter page 1700 × 2200 px. For other pages or 300 DPI, use one of the tools below.
Adobe Acrobat
Choose Export PDF → Image → JPEG, open the settings (gear icon) and set the resolution, for example 300 pixels/inch, before exporting.
Mac Preview
Open the PDF, choose File → Export, set Format to JPEG, type 300 in Resolution and move the Quality slider toward Best. Preview exports the current page.
pdftoppm (free, command line)
pdftoppm -jpeg -r 300 -jpegopt quality=95 input.pdf page writes every page as page-1.jpg, page-2.jpg and so on at 300 DPI.
Ghostscript
gs -sDEVICE=jpeg -r300 -dJPEGQ=95 -o page-%03d.jpg input.pdf does the same with Ghostscript.
What Is DPI?
DPI stands for dots per inch. When converting PDF to images, DPI determines how many pixels represent each inch of the original document. Higher DPI produces more pixels, resulting in sharper images but larger file sizes. Once the JPG is saved, its DPI is only a print tag; see image DPI explained for what 72, 300 and 600 DPI change.
A standard A4 PDF page (8.27 × 11.69 inches) produces these image dimensions at different DPI settings:
| DPI | Pixel Dimensions (A4) | Approx. File Size | Best For |
|---|---|---|---|
| 72 DPI | 595 × 842 | ~85 KB | Screen previews, email attachments |
| 150 DPI | 1240 × 1754 | ~350 KB | General web use, e-readers |
| 200 DPI | 1654 × 2339 | ~600 KB | Default — balanced quality/size |
| 300 DPI | 2480 × 3508 | ~1.4 MB | Print quality, industry standard |
| 600 DPI | 4960 × 7016 | ~5.5 MB | High-res printing, fine detail, OCR |
Key rule: Doubling the DPI roughly quadruples the file size (and pixel count). Going from 150 DPI to 300 DPI produces 4x more pixels.
DPI Comparison: When to Use Each Setting
72 DPI — Screen Previews
72 DPI matches the original resolution of early computer displays. It produces small, fast-loading images suitable for email attachments, quick document previews, and thumbnail generation. Text is readable but may appear slightly soft. Not suitable for printing.
150 DPI — Web Sharing
150 DPI is the sweet spot for web-quality images. Text is crisp and readable on screen. Images are small enough for email and messaging apps. This is the recommended setting for sharing document pages on social media, chat apps, or embedding in blog posts.
200 DPI — Default (Balanced)
200 DPI is the fixed setting of the converter on this page (it has no DPI option). It produces clear, sharp images suitable for both screen viewing and basic printing. Text rendering is clean, and the file sizes are reasonable. This is the best all-purpose setting if you are unsure which DPI to choose.
300 DPI — Print Quality (Industry Standard)
300 DPI is the industry standard for printed documents. At typical reading distance (12–18 inches), the human eye cannot distinguish individual dots at 300 DPI. This setting is recommended for:
- Office printing (reports, handouts, brochures)
- Archival copies of important documents
- Images that may be cropped or zoomed
- OCR processing (minimum recommended DPI)
600 DPI — High-Resolution
600 DPI is overkill for most purposes but essential for specific use cases: professional printing with fine text or detailed line art, high-accuracy OCR on dense or small-font documents, and archival preservation where future use cases are unknown. File sizes are significantly larger. If a print shop asks for more than resolution, our guide to the best TIFF settings for printing covers color space and compression.
Use Case Recommendations
| Use Case | Recommended DPI | Why |
|---|---|---|
| Email attachment | 150 DPI | Small files, readable text |
| Social media sharing | 150–200 DPI | Good quality, fast loading |
| Web publishing | 200–300 DPI | Sharp on high-DPI screens |
| Office printing | 300 DPI | Industry standard, crisp text |
| Professional printing | 300–600 DPI | Maximum detail for fine text |
| OCR processing | 300 DPI (600 preferred) | Higher accuracy recognition |
| Archival | 600 DPI | Future-proof, maximum quality |
File Size Impact
Understanding the file size implications of each DPI setting helps you make informed decisions, especially when processing multi-page PDFs:
| DPI | 1-Page PDF | 10-Page PDF | 50-Page PDF |
|---|---|---|---|
| 72 | ~85 KB | ~850 KB | ~4.2 MB |
| 150 | ~350 KB | ~3.5 MB | ~17 MB |
| 200 | ~600 KB | ~6 MB | ~30 MB |
| 300 | ~1.4 MB | ~14 MB | ~70 MB |
| 600 | ~5.5 MB | ~55 MB | ~275 MB |
Tip: For large multi-page PDFs, start with 200 DPI in a tool that lets you choose. If the quality is insufficient for your needs, re-convert at 300 DPI. There is rarely a reason to use 600 DPI unless you are doing professional printing or OCR. For text-only documents, you can also shrink files if you first convert a PDF to grayscale before rendering the pages.
DPI vs JPEG Quality
DPI and JPEG quality are two separate settings that both affect output quality. DPI controls the number of pixels (resolution). JPEG quality controls how much those pixels are compressed.
The converter on this page saves JPG at quality 92, where compression artifacts are hard to see at normal zoom. Lower quality settings make smaller files but add visible artifacts around text edges first.
For the sharpest possible text rendering, use PNG output instead of JPG. PNG uses lossless compression, producing larger files but with zero compression artifacts around text characters.
How to Tell if a PDF Is High Resolution
Text and vector drawings in a PDF have no fixed resolution: they stay sharp at any DPI you render. Scanned pages and photos are images with a fixed number of pixels, and rendering them above their own resolution does not add detail.
To see the real resolution of the images inside a PDF, run pdfimages -list input.pdf (poppler-utils) and read the x-ppi and y-ppi columns, or use Acrobat Pro’s Preflight. A scan at 150 ppi gains nothing from a 600 DPI export.