Secure your PDF with strong password protection and encryption.
Reduce file size without losing quality.
Old scanned photos, pixelated thumbnails, and grainy images inside PDFs don't have to stay that way. Our AI‑powered tool enhances photo quality directly within your PDF – sharpen edges, remove noise, restore faded colours, and upscale resolution for printing. Perfect for family archives, product catalogues, real estate listings, and historical documents. Free trial, no signup required.
Did you know? A 150 DPI photo printed at 300 DPI loses 75% of its sharpness. Our AI upscaling recovers that detail, making your PDF photos print‑ready.
Low resolution makes photos pixelated when printed or zoomed.
Blocky squares and blur from over‑compression.
Scanner noise or high ISO grain.
Old scans lose colour vibrancy.
Bonus – physical damage marks: Scratches, dust, and crease marks can be reduced with our despeckle and inpainting filters.
Upload your PDF – The tool detects all images and analyses their quality.
Select "Photo Enhancement" preset – Applies sharpening, denoising, colour correction, and optional upscaling.
Choose restoration strength – Light (mild fixes), Medium (recommended), or Strong (heavy restoration).
Apply AI enhancement – Preview the improved photos.
Download the enhanced PDF – Your photos will look clearer and more vibrant.
Pro Tip: For very old or damaged photos, run the enhancement twice: first with "Strong" denoising, then with "Light" sharpening.
All enhancements are applied only to photo regions; text and vector graphics remain untouched.
Example 1: Old family album. A 150 DPI scan of a 1970s photo was faded and grainy. After colour restoration + denoise + upscale to 300 DPI, the photo looked vibrant and sharp enough to reprint.Example 2: Real estate listing. A PDF brochure had pixelated room photos from low‑res uploads. After AI upscaling to 300 DPI and sharpening, the images became crisp, helping sell the property faster.Example 3: Museum archive. A historical photo had severe crease marks and dust. Despeckle + inpainting reduced the damage, making the image suitable for publication.
Upscaling photos increases file size, but our smart compression (JPEG2000) can reduce overhead by up to 70% while preserving sharpness. Use the "Web" profile for minimal size increase (good for email), "Balanced" for most documents, or "Print" for maximum quality. For photo‑heavy PDFs, we recommend extracting photos, enhancing them individually, then re‑embedding (pro feature).
Tip: If you only need to view photos on screen, skip upscaling – sharpening + denoise already makes a big difference without adding size.
⚡ Need to adjust or standardise DPI without changing pixels?
Use our dedicated PDF DPI Changer to view, adjust, or unify the DPI metadata of embedded images. Perfect for pre‑press compliance, print workflow validation, and preparing files for commercial printing without altering visual quality.
Photos in PDFs often degrade due to low scanning resolution (under 200 DPI), heavy JPEG compression, multiple re‑saving cycles, or improper resizing. Our AI restoration sharpens edges, removes grain, and can upscale resolution to recover lost detail.
Yes. Our tool includes colour restoration, contrast enhancement, and scratch/spot removal. While it cannot fix physical tears or missing parts, it dramatically improves faded colours, reduces yellowing, and brings back depth to old photographs.
Sharpening and denoising alone add little size (under 5%). Upscaling resolution (e.g., from 150 to 300 DPI) may increase size by 2‑3x, but our smart compression keeps it reasonable. For photos intended for web or email, we recommend sharpening without upscaling.
Absolutely. Our AI super‑resolution can upscale photos to 300‑600 DPI, reconstructing realistic detail and removing pixelation. The result is print‑ready, even if the original was a tiny thumbnail.
Our current version focuses on sharpness, noise reduction, and contrast. Colour balance and white balance are automatically adjusted, but red‑eye removal is not included. For fine photo editing, we recommend using a dedicated photo editor before embedding into a PDF.
Yes. We use TLS 1.3 encryption, and files are auto‑deleted within 24 hours. An offline desktop version is available for those with strict privacy concerns.
The online tool processes one file at a time. For batch processing, our desktop application handles folders and applies the same settings to all PDFs.
Definitely. Upscaling to 300 DPI and sharpening will make printed photos look much sharper. For best results, use the "Print Optimised" preset before printing.
Upload your PDF and let AI sharpen, denoise, and upscale every photo – free trial, no signup.
Enhancing a PDF improves visual clarity by adjusting resolution, sharpening text edges, and increasing contrast between foreground and background elements. This process is particularly useful for scanned documents, blurry text, or faded paperwork.
Several factors may reduce the readability of a PDF document. Low-resolution scanning, aggressive compression, improper export settings, and camera-captured documents can all introduce blur or reduce contrast.
Modern PDF enhancement tools apply multiple processing techniques to improve readability.
PDF enhancement algorithms work by analyzing pixel density and grayscale distribution. Contrast adjustment increases the difference between text and background while sharpening filters reconstruct blurred edges. When combined with OCR preparation, enhancement dramatically improves machine readability.
Explore the full collection of tools in the PDF Enhancement Guide.