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Reduce file size without losing quality.
Blurry images ruin the professionalism of your PDFs – whether they are photos, product shots, or scanned graphics. Our AI‑powered tool fixes blurry images inside any PDF using advanced sharpening and deconvolution. Restore crisp edges, remove motion blur, and correct out‑of‑focus pictures. No software installation required. Free trial, no signup.
Did you know? Motion blur is the #1 cause of blurry scanned images. Our deconvolution filter can estimate the blur direction and length, then reverse it – recovering fine details.
Caused by scanner movement or shaky camera. Appears as smearing in one direction. Our deconvolution corrects it.
Lens not properly focused. The image appears uniformly soft. Our sharpening filter restores edges.
Blocky artifacts and softening from excessive compression. Deblocking + sharpening fixes it.
Stretching an image makes it blurry. Combine upscaling + sharpening for best results.
Bonus – scanner optics blur: Even good scanners have slight optical blur. Our out‑of‑focus correction works well for this.
Upload your PDF – The tool detects blur type and severity.
Select restoration strength – Light (mild blur), Medium (recommended), or Strong (heavy blur).
Apply AI deblurring – The tool uses deconvolution and sharpening to restore edges. Preview the result.
Download the fixed PDF – Images will be significantly clearer.
Pro Tip: For images that are both blurry and noisy, apply denoise first, then deblur – noise can confuse deconvolution. Our "Auto" mode does this automatically.
These techniques are applied automatically – no technical knowledge required.
Example 1: Old scanned family photo. A 1960s photo had motion blur from a shaky hand during scanning. After motion deconvolution, the faces became sharp and recognisable.Example 2: Product brochure. Low‑resolution catalogue images were blurred by upscaling. After sharpening + mild upscaling, the products looked crisp.Example 3: Legal document scan. A contract page was slightly out of focus. Our out‑of‑focus correction made the fine print readable.
Deblur (sharpening): Corrects softness while keeping the same pixel count. Use when the image is already at sufficient resolution but appears blurry.Upscaling (super‑resolution): Adds pixels to increase DPI. Use when the image is pixelated or needs to be printed larger.Our tool can combine both: first deblur, then upscale for maximum quality. Use the "Print Optimised" preset for this workflow.
Tip: For images that are both blurry and low resolution, always deblur first, then upscale. Deblurring after upscaling can amplify artifacts.
⚡ 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.
Yes. Our AI‑powered tool uses advanced sharpening and deconvolution algorithms to restore edge contrast and reduce blur. While you cannot recover detail that was never captured, the improvement is often dramatic – making previously unusable images perfectly acceptable.
Blur can come from motion during scanning, out‑of‑focus camera, low scanning resolution, heavy JPEG compression, or improper downsampling. Our tool can correct all these types of blur.
Basic sharpening adds very little size (under 5%). Deconvolution (deblurring) may increase size slightly, but our smart compression keeps the final file reasonable. Unlike upscaling, sharpening does not add pixels – only enhances existing ones.
Yes. Our AI classifies the type of blur (motion, Gaussian, lens blur) and applies the appropriate restoration algorithm. Motion blur is directional and is corrected with a deconvolution kernel; out‑of‑focus blur uses a different approach.
Absolutely. When you sharpen an image that contains text, the text edges will also become crisper. For best results, we recommend using the “Document” preset, which balances text and photo enhancement.
Yes. TLS 1.3 encryption, auto‑deletion within 24 hours. Offline desktop version available for sensitive documents.
The online tool processes one file at a time. For batch processing, use our desktop application (paid).
Sharpening increases edge contrast, which improves perceived sharpness. Deblurring attempts to reverse the actual blur process (e.g., motion or focus blur) using mathematical models. Our tool applies both where appropriate.
Upload your PDF and let AI sharpen, deblur, and restore clarity – 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.