What DPI should I use when converting PDF to image?

For screen viewing and web use, 72-150 DPI is sufficient. For printing, use 300 DPI for standard documents and 600 DPI for fine detail like technical drawings or maps. Higher DPI means larger file sizes — a single A4 page at 300 DPI produces approximately a 25 MB uncompressed image (2480 × 3508 pixels).

Should I convert PDF to PNG or JPEG?

Use PNG for text-heavy documents, screenshots, diagrams, and anything requiring transparency — PNG is lossless so text stays crisp. Use JPEG for photo-heavy PDFs, scanned documents, and when file size matters more than pixel-perfect quality. JPEG at 85% quality offers a good balance of size and visual fidelity.

How do I convert a multi-page PDF to images?

Most tools create one image per page, naming them page-1.png, page-2.png, etc. Our PDF to Image tool processes all pages automatically. For batch processing, you can select specific page ranges to convert rather than the entire document.

Will converting a PDF to an image lose text selectability?

Yes. Images are rasterized — the text becomes pixels and is no longer selectable or searchable. If you need to preserve text selectability, keep the PDF format. If you must use images but need searchability later, you'll need to run OCR (Optical Character Recognition) on the resulting images.

What is the maximum image size browsers can handle?

Most modern browsers can handle canvas sizes up to approximately 16,384 × 16,384 pixels (268 megapixels). This means a single A4 page at 600 DPI (4960 × 7016 pixels) works fine. However, very large pages at high DPI may exceed memory limits on mobile devices. Keep this in mind when processing oversized PDFs.

PDF to Image Conversion Guide: Formats, DPI & Quality Settings

Conversion 9 min read April 2026

Converting PDFs to images is one of the most common document tasks — from creating thumbnails for web previews to generating print-ready files from vector designs. The key is choosing the right format, resolution, and quality settings for your intended use.

Choosing the Right Image Format

Format	Compression	Transparency	Best For	Typical Size (A4 @ 150 DPI)
PNG	Lossless	Yes	Text, diagrams, screenshots	200-800 KB
JPEG	Lossy	No	Photos, scanned documents	80-300 KB
WebP	Both	Yes	Web display (modern browsers)	60-250 KB
TIFF	Lossless	Yes	Archival, print production	3-10 MB

DPI Settings Guide

DPI (Dots Per Inch) determines the resolution of the output image. Higher DPI means more pixels and more detail, but also larger files:

DPI	Pixels (A4 page)	Use Case	File Size (PNG)
72	595 × 842	Screen thumbnails, email previews	50-200 KB
150	1240 × 1754	Web display, presentations	200-800 KB
300	2480 × 3508	Standard printing, documents	1-3 MB
600	4960 × 7016	High-quality print, fine detail	3-8 MB

Quality vs. File Size Trade-offs

For JPEG output, the quality parameter (0-100%) controls the compression ratio:

95-100%: Near-lossless — maximum quality, minimal size savings
80-90%: Excellent quality — imperceptible differences, 60-70% size reduction
60-80%: Good quality — slight softening on text edges, 70-80% size reduction
Below 60%: Visible artifacts — only use for thumbnails or previews

💡 Recommendation: For text documents, use PNG at 150 DPI for web or 300 DPI for print. For photo-heavy PDFs, use JPEG at 85% quality. These settings offer the best balance of clarity and file size.

Common Conversion Scenarios

Web Thumbnails

Format: JPEG or WebP
DPI: 72-96
Pages: First page only
Post-processing: Resize to thumbnail dimensions (200-400px wide)

Presentation Slides

Format: PNG (for text clarity)
DPI: 150-200
Pages: All pages
Post-processing: None — use at native resolution

Print Production

Format: TIFF (lossless) or PNG
DPI: 300-600
Pages: Selected ranges
Post-processing: Color profile conversion if needed

Social Media Sharing

Format: JPEG at 85% or PNG
DPI: 150 (most platforms downscale anyway)
Pages: Specific pages of interest
Post-processing: Crop to platform aspect ratio

Performance Tips

Convert only needed pages — processing a 200-page PDF at 300 DPI generates gigabytes of images
Use progressive JPEG for web — images appear immediately and sharpen as they load
Match DPI to output size — a web image displayed at 600px wide doesn't benefit from 600 DPI rendering
Browser-based tools process everything locally — no upload wait times, no server queues

Frequently Asked Questions

72-150 DPI for screen/web, 300 DPI for standard printing, 600 DPI for fine detail. Higher DPI = larger files. A single A4 page at 300 DPI produces a 2480 × 3508 pixel image.

PNG for text-heavy documents (lossless, crisp text). JPEG for photo-heavy PDFs and scanned documents (smaller files). JPEG at 85% quality offers a good size-quality balance.

Most tools create one image per page automatically (page-1.png, page-2.png, etc.). You can usually select specific page ranges to convert rather than the entire document.

Yes. Images are rasterized — text becomes pixels and is no longer selectable or searchable. To restore searchability, you'd need to run OCR on the resulting images.

Most modern browsers support canvas sizes up to ~16,384 × 16,384 pixels. A single A4 at 600 DPI (4960 × 7016 px) works fine. Very large pages at high DPI may exceed mobile device memory.

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