You can upload a maximum of 10 images at a timeDrag & Drop your images here orSupported formats: PDF
Max 20 MB · 10 files
Output format
90%
Resolution (DPI)
Convert PDF to WebP Online Free, Lightweight for Web
Benchmark · Real data
Engine: Rust + libvipsPDF to WEBP: Real Conversion Data
File size · before → after
| Resolution (DPI) | Percent smaller vs JPG | |
|---|---|---|
| 72 DPI | 31% | |
| 150 DPI | 51% | |
| 300 DPI | 55% | |
| 600 DPI | 62% |
- Avg input (PDF)
- 947KB
- Avg output (WEBP)
- 426KB
- Size change · WEBP is smaller
- −30-60%
- Avg conversion time
- 1.42s
- Quality
- lossy (Q80)
- Transparency
- preserved
Measured on 26 photographic PDF pages (June 2026) using our Rust + libvips engine. Your results will vary with content and resolution.
How to Convert Images Online
1Upload PDF
Drag and drop your PDF file. Multi-page PDFs supported.
2Choose settings
Select DPI (72/150/300), encoding mode (lossy or lossless), and quality level.
3Download WebP
Click Convert, then download individual WebP files or a ZIP of all pages. Your files stay available for 6 hours, then are removed automatically.
Supported Image Formats
WebP
Modern image format by Google. Up to 30% smaller than JPG with the same quality.
PDF
Portable Document Format. Convert PDF pages to JPG, PNG or WebP images.
HEIC
Apple photo format used by iPhone and iPad. High quality with small file size.
HEIF
High Efficiency Image Format — same as HEIC, used on Apple devices.
PNG
Lossless format that preserves every pixel. Best for screenshots and logos.
JPG
Universal format for photos. Supported everywhere, great balance between quality and file size.
GIF
Classic format for simple animations. Supports transparency and up to 256 colors.
BMP
Uncompressed bitmap format. Maximum quality but very large file size.
TIFF
Professional lossless format used in printing and photography.
AVIF
Next-gen format with excellent compression. Up to 50% smaller than JPG.
PPM
Portable Pixmap format used in Unix/Linux environments.
HDR
High Dynamic Range format storing extended brightness data.
FITS
Flexible Image Transport System used in astronomy and science.
AVIF vs WebP vs HEIC vs JPG
Quick comparison to help you choose the right format
AVIF
- Size: Up to 50% smaller than JPG
- Browsers: Chrome, Firefox, Safari
- Transparency: ✓
- Best for: Web performance
WebP
- Size: 25-35% smaller than JPG
- Browsers: All modern browsers
- Transparency: ✓
- Best for: Web compatibility
HEIC
- Size: ~50% smaller than JPG
- Browsers: Safari only
- Transparency: ✓
- Best for: iPhone storage
JPG
- Size: Baseline
- Browsers: All browsers & apps
- Transparency: ✗
- Best for: Universal sharing
Frequently Asked Questions
- How do I convert PDF to WebP?
- Upload your PDF, choose DPI (150 for web, 300 for Retina), select lossy or lossless encoding, click Convert. Each page becomes a separate WebP image delivered as a ZIP.
- Is WebP smaller than JPG for PDF page images?
- Yes. In our tests, lossy WebP at quality 80 was 30 to 60% smaller than JPG for the same PDF page, with the gap widening at higher DPI: about 31% at 72 DPI, 51% at 150, 55% at 300, and 62% at 600. Exact savings depend on page content.
- What DPI should I use?
- 72 for thumbnails, 150 for web hero images (sweet spot), 300 for print or Retina 2× displays. Higher than 300 rarely adds visible detail.
- Does WebP support transparency?
- Yes, full 8-bit alpha in both lossy and lossless modes. JPEG cannot do this.
- Why do my colors look different after conversion?
- Print PDFs use CMYK color space, while WebP only supports sRGB. Convertify renders the PDF with poppler, which converts CMYK to RGB during rasterization. This is a direct render rather than a managed ICC transform, so if you need exact press color, finish the CMYK work in a prepress editor.
- Can I convert all pages at once?
- Yes. All pages are rendered and packaged as a ZIP file.
- Does WebP work in Safari?
- Yes, since Safari 14 (September 2020). Over 97% of browsers support WebP globally.
- Should I choose lossy or lossless?
- Lossy WebP (VP8) for photographs and brochures gives the smallest files. Lossless WebP (VP8L) keeps every pixel exact, best for text-heavy pages and diagrams. Set the quality slider to maximum for lossless, or lower it for smaller lossy files.
- Why is my WebP file larger than expected?
- Likely using lossless at high DPI. Switch to lossy at 150 DPI for web use.
- Does Convertify delete my files?
- Your converted file stays available to download for 6 hours, then it is removed from the server automatically. Convertify is free and needs no signup to convert.
- Can I convert only specific pages of a PDF to WebP?
- Yes. Upload a multi-page PDF, switch to Choose pages, and enter a range like 1-5, 8, 12. Convertify converts only the selected pages to WebP and returns them as a ZIP, so you can extract a single page or a page range from a PDF as WebP without processing the full file.
- Can I resize the image during conversion?
- Yes. Use Convertify's <a href="/resize-image">image resizer</a> to set a custom width or crop to exact dimensions.
- Can I resize the image during conversion?
- Yes. Use Convertify's <a href="/resize-image">image resizer</a> to set a custom width or crop to exact dimensions.
Render pages vs extract embedded images, two different operations
When you convert PDF to WebP, there are two fundamentally different things you might want. Rendering means rasterizing the entire page, text, vector graphics, embedded photos, backgrounds, into one flat image at a chosen resolution. This is what most people need: turning a brochure page into a hero image, a slide into a social media post, or a spec sheet into a product page asset. Extracting means pulling out the original images that were embedded inside the PDF, the photographs, logos, and charts that the PDF author placed during layout. Extraction preserves the original resolution and compression of each embedded image but ignores text, vector graphics, and page layout. Convertify performs full-page rendering at your chosen DPI.
How DPI controls your output, the decision tree
DPI (dots per inch) sets how many pixels the renderer generates per inch of the PDF page. An A4 page is 8.27 by 11.69 inches. At 72 DPI that is a 595 by 842 pixel image, fine for a thumbnail. At 150 DPI you get 1240 by 1754 pixels, the sweet spot for web hero images and blog posts. At 300 DPI the output is 2480 by 3508 pixels, print quality and ideal for Retina displays. At 600 DPI an A4 page is 4960 by 7016 pixels, suited to large-format print or archival masters. Going above 300 DPI rarely adds visible detail for text-and-vector PDFs because the renderer already captures every curve, it mostly multiplies file size. For most web use cases, 150 DPI is the right choice for PDF to WebP.
PDF to WebP file size by DPI: measured JPG vs WebP
| DPI | Pixels (A4) | JPG Q80 | WebP lossy Q80 | WebP vs JPG | WebP lossless |
|---|---|---|---|---|---|
| 72 | 595 × 842 | ~88 KB | ~61 KB | 31% smaller | ~490 KB |
| 150 | 1240 × 1754 | ~244 KB | ~117 KB | 51% smaller | ~1.3 MB |
| 300 | 2480 × 3508 | ~947 KB | ~426 KB | 55% smaller | ~740 KB |
| 600 | 4960 × 7016 | ~2.3 MB | ~874 KB | 62% smaller | ~750 KB |
WebP lossy vs lossless, which mode to choose
WebP has two compression engines and Convertify exposes both. Lossy mode uses VP8, a DCT-based codec like JPEG but with better entropy coding and in-loop deblocking. At quality 75 to 85 it produces files well under half the size of the same page as JPG, the right choice for photographic content, brochure pages, and any case where small files matter most. Lossless mode uses VP8L, a different codec built on predictive coding, LZ77 back-references, Huffman coding, and a color cache. It preserves every pixel exactly, the right choice for text-heavy pages, line art, diagrams, and screenshots. Set the quality slider to its maximum for lossless WebP, or lower it for smaller lossy files. Both modes support 8-bit alpha transparency.
Why PDF to WebP instead of PDF to JPG?
Three reasons to choose WebP over JPG when converting a PDF. First, file size: in our tests lossy WebP at quality 80 was 30 to 60% smaller than JPG for the same page, with the gap widening at higher DPI (about 31% at 72 DPI, 51% at 150, 55% at 300, 62% at 600). For a 10-page PDF at 150 DPI that is a large saving on page load time. Second, transparency: JPEG cannot represent it at all, while WebP supports full 8-bit alpha for overlaying on colored backgrounds or compositing in CSS. Third, modern web support: every major browser renders WebP, Chrome since version 23, Firefox since 65, Edge since 18, Safari since 14. Use the HTML picture element with a JPG fallback for the rare older client.
CMYK color profiles, the color shift problem
Print-prepared PDFs often use CMYK color space. WebP only supports sRGB, so a CMYK page must be converted to RGB before encoding. Convertify renders the PDF with poppler, which converts CMYK to RGB while it rasterizes the page. This is a direct render, not a managed color transform with a named output profile such as SWOP or GRACoL. For most documents the result closely matches what the PDF looks like on screen. If your brochure was built for offset printing and you need exact press color, finish the CMYK work in a prepress editor that lets you assign the target ICC profile.
Core Web Vitals, how PDF-to-WebP improves LCP scores
Largest Contentful Paint (LCP) measures how fast the largest visible element loads. For a landing page using a PDF-sourced hero image, switching from JPG to WebP at the same DPI cuts the payload by roughly half at 150 to 300 DPI, which on a typical 4G connection can shave hundreds of milliseconds off LCP. If your site serves PDF-sourced graphics such as infographics, brochure excerpts, or report figures, converting them to WebP is one of the cheapest LCP wins available. Use the HTML picture element with a JPG fallback for the small share of browsers that do not support WebP.
Multi-page PDFs: one WebP per page, batching, and memory limits
Most converters default to rendering only the first page of a multi-page PDF. libvips, for example, reads page 1 unless explicitly told to load all pages via the n=-1 parameter. When all pages share the same dimensions, it is technically possible to output them as a single animated WebP, but in practice, converters produce one WebP file per page with appended page numbers (page-001.webp, page-002.webp).
For large PDFs, 50 pages or more, memory consumption and processing time become real constraints. A 100-page PDF at 150 DPI produces roughly 100 individual rasterization and encoding passes. Workflows that process these documents typically batch pages in groups of 10–20 to avoid timeout or out-of-memory failures. Pages with different dimensions cannot be combined into a single strip and must be rasterized individually. If your PDF is a scanned book or report destined for web display, PDF to JPG may be simpler for platforms that do not yet accept WebP, while PDF to PNG preserves text sharpness at the cost of larger files.
You are not limited to converting every page. For a multi-page PDF, choose Choose pages and enter a range like 1-5, 8, 12 to convert only the pages you want, returned together as a ZIP.
Text sharpness, accessibility, and SEO after converting PDF to WebP
PDF rasterizers differ significantly in text rendering quality. MuPDF produces high-quality anti-aliased text by default. Ghostscript requires explicit anti-aliasing flags (GraphicsAlphaBits=4, TextAlphaBits=4), without them, text appears blocky. Once rasterized, the compression mode determines whether text stays sharp: lossless WebP produces pixel-identical output to PNG, preserving every edge. Lossy WebP at quality below 85 softens fine details, particularly small font sizes and thin strokes. For documents with text, use lossless mode or lossy quality 90+.
Converting a text PDF to images removes the text from Google's index and from screen readers entirely. Google can index live text inside PDFs directly, but once pages become WebP images, that content is invisible to crawlers. To mitigate this, every converted image should carry meaningful alt text describing the page content. For SEO-critical documents, keep the original PDF available alongside the WebP previews, link the downloadable PDF and use the WebP images as visual previews only.
Troubleshooting common PDF to WebP problems
Output WebP larger than expected: you are likely in lossless mode at high DPI. Lower the quality slider for lossy mode, or drop to 150 DPI for web use. Blurry or pixelated text: the DPI is too low, raise it to 150 or 300. Colors look greenish or faded: the PDF uses CMYK, which poppler renders to RGB during rasterization without a managed ICC profile, so compare against Adobe Acrobat if you need exact print color. Transparency disappeared: most PDF pages have an implicit white background that the renderer paints before drawing content, which is standard. Only the first page converted: Convertify converts all pages and returns a ZIP. Photoshop cannot open the WebP: upgrade to Photoshop 23.2 or later, or install the WebPShop plugin. Safari does not display the image: update to Safari 14 or later.