Low-resolution scans
Old scans, faxed pages, and photos saved as PDFs can look jagged when enlarged. Upscaling adds pixels to make their edges easier to view.
ONLINE PDF UPSCALER
Upscale scanned PDFs
with AI up to 4×.
Make blurry scans, images, and graphics clearer. Choose 2× or 4× AI upscaling, compare the result, and download your PDF. Try up to five pages free, or choose Pro cloud AI when credit checkout becomes available.
START HERE
5 pages freeUpload a PDF to upscale
Drop your PDF hereor browse filesPDF only · up to 50 MB
Choose your resultPreview the first page before processing.
Pro · cloud AI for PDF page images
Real-ESRGAN processes a rendered image of each page for 1 credit per page. The new PDF keeps the page size, but selectable text, links and forms are flattened. Results vary with the source; cloud processing does not guarantee sharper output. Saved results expire after 14 days.
See credit packs ↓UPSCALE MODEChoose 2× or 4× AIBest for scanned images and graphics
Free for up to 5 pages Choose 2× or 4× AI Same physical page size
BEFORE / AFTER
Compare the details
Focus on the page content, then drag either image to pan both previews together. You can also zoom or use the scrollbars.
Original![Original PDF page preview]()
Enhanced![Enhanced PDF page preview]()
THE PROCESS
How to upscale a PDF online
Choose a scanned PDF, let the tool increase its page-image resolution, and download the result. No account is needed for eligible free files.
01
Choose your scanned PDF
Drop a PDF into the tool. We check its page count and choose the available processing option. Files can be up to 50 MB and 100 pages; larger files should be split before processing.
02
Choose 2× or 4× upscaling
Preview the result, then choose 2× for faster processing or 4× for more image detail. Text clarity mode is a separate option for faint scans.
03
Download the upscaled PDF
Choose full-page upscaling for scans, or preserve the original text and layout while enhancing compatible embedded JPEG images. Review small text and important numbers before sharing it.
THE RIGHT TOOL FOR THE JOB
What does PDF upscaling improve?
PDF upscaling increases the pixel resolution of page images. It is most useful when a scan looks soft or pixelated at normal zoom. It is less useful for documents whose text and graphics were created digitally and are already sharp.
Photos and screenshots
Images embedded in PDFs can look blocky when enlarged. Upscaling may smooth visible pixels, though the result still depends on the source image.
Diagrams and line art
Scanned charts and line drawings may look cleaner after processing. Fine lines and labels still depend on the quality of the original capture.
Upscaling cannot recover information that is absent from the source image. For a severely blurred page, rescanning at a higher resolution usually gives a more faithful result.
YOUR PROCESSING OPTIONS
Free and credit-based PDF upscaling
Choose the option that fits your PDF. Start free with short documents, then use credits for longer files when checkout becomes available.
For short scanned PDFs
Upscale eligible short PDFs with 2× or 4× AI, or choose text clarity mode for faint scans. The free allowance is 10 pages per IP address each UTC day.
Start a free PDF ↗Cloud AI for image-based pages
Files over five pages, or processing after the free allowance, use one credit per page. Rendered page images are enhanced with cloud Real-ESRGAN and combined into a downloadable PDF. Text and links are flattened; results vary.
View credit packs ↗FREE ACCESS
Small PDFs, free.
Process up to 5 pages per PDF and 10 pages per IP address each UTC day. Pro cloud processing uses credits after that, or for larger files.
5pages per free file
10free pages per day
SIMPLE PRICING
PDF upscaling credit packs
Pro credit checkout is coming soon. The packs below provide one credit per processed page, with up to 100 pages per PDF. Credits can be used across multiple files.
120 credits
$5
For occasional long PDFs.
250 credits
$10
130 more pages than Starter.
600 credits
$20
For regular batches of scans.
Checking payment availability…
When checkout opens, sign in to buy credits. Stripe will handle payment details; Pro results will remain available for 14 days. My account · Refund policy.
BEFORE YOU PROCESS
Get a better result from a scanned PDF
The source scan matters more than the upscale factor. These checks help you choose the right file and understand the output.
Start with the best original
Use the highest-quality scan you have. Avoid repeatedly saving a screenshot or heavily compressed copy as a PDF; lost detail cannot be faithfully recreated later.
Use upscaling for image-based pages
If you can select text, use the preserve-text option to enhance compatible embedded images while retaining the original text and layout.
Check the finished document
Compare small print, signatures, tables, and numbers with the source. AI may smooth or reshape marks, so the result should not replace the original for recordkeeping.
COMMON QUESTIONS
PDF upscaler questions
Can I increase PDF resolution without changing page size?
Yes. Both modes keep the same physical page size. Full-page mode turns pages into images and does not preserve searchable text or links. The embedded-image mode preserves the original PDF structure while enhancing compatible JPEG images; other image types remain unchanged.
Will AI upscaling make every PDF clearer?
No. It works best for low-resolution scanned pages. Digitally generated PDFs already have sharp text and usually do not benefit. Severely blurred letters cannot always be restored accurately.
Does my free PDF get uploaded?
Files selected from your device stay in your browser for free processing. If you import a public Google Drive link, Dropbox link, or direct PDF URL, our server fetches and streams the original file to your browser without saving it. If you sign in and explicitly choose to save the finished result, that output PDF is uploaded to private storage for 30 days. Pro sends rendered page images to our AI provider and saves the finished PDF for 14 days.
Why does processing take time?
AI upscaling uses your computer’s graphics processor or a cloud processor. Large pages and older devices may take longer. Keep this tab open until the download is ready.
How do credits work for larger PDFs?
One credit processes one page, with a current limit of 100 pages per PDF. A credit pack can cover multiple files. Credits and purchase records are linked to your account and available after you sign in on another device.
Can I process a very large PDF?
Each PDF must be no larger than 50 MB or 100 pages. Large files are processed one page at a time in your browser, so processing can take a long time and needs this tab to stay open. For more reliable results, split a large PDF into smaller files of about 20–30 pages. A 600-credit pack can be used across multiple PDFs; it does not mean 600 pages in one file.
How long can I download past results?
Pro output PDFs remain available for 14 days, and saved free results for 30 days, then they are removed. Download any files you want to keep before they expire.
Can I use this PDF upscaler for confidential documents?
For eligible free files selected from your device, the document remains on your device unless you choose to save the result. Public link imports pass through our server and should not be used for confidential files. Paid cloud processing transmits rendered page images to an AI provider. Review the Privacy Policy before processing sensitive material.