Image Quality Enhancer — HD & 4K Upscaler

Make a soft, dark or noisy image clearer

Not every photograph comes out usable. A document scan is too faint to read, an old photo has gone grainy, a picture taken in poor light is dark and noisy. Enhancement works on all three by sharpening edges, reducing grain and lifting contrast so detail becomes visible again.

There is a separate text mode, which is worth knowing about. Ordinary enhancement is tuned for photographs; text mode is tuned for documents, pushing contrast between ink and paper so small or blurred writing becomes legible. That makes it a useful first step before running OCR.

It is important to be realistic about what enhancement can do. It reveals detail that is present but hard to see. It cannot invent detail that the camera never captured — a badly out-of-focus photograph will always be a badly out-of-focus photograph.

Who uses this most

• Document scans — Making faint or low-contrast scans readable before running OCR.
• Old photographs — Reducing grain and restoring some clarity to scanned prints.
• Low-light photos — Lifting shadows and reducing the noise that appears in dim conditions.
• Screenshots and small images — Sharpening images that were saved at low resolution.
• Product photos — Improving clarity for listings without expensive equipment.

How to use the image quality enhancer

1. Upload your imageAdd a JPG or PNG that needs improving.
2. Choose the modeStandard enhancement suits photographs. Text mode is tuned for documents and handwriting, prioritising legibility over natural appearance.
3. Adjust the settingsControl sharpening, noise reduction and contrast. Small adjustments usually look better than large ones.
4. Compare before and afterCheck that you have improved clarity without introducing harsh halos or crushing detail into pure black.
5. DownloadSave the enhanced image to your device.

Common problems and how to fix them

The image now looks harsh and over-sharpened

You pushed sharpening too far. Reduce it until edges look defined but natural — bright halos around edges are the sign you have gone too far.

Noise became more visible

Sharpening amplifies grain along with detail. Increase noise reduction before increasing sharpening, not after.

A blurry photo is still blurry

Motion blur and focus blur cannot be reversed. Enhancement improves clarity of detail that was captured, but there is a limit.

Text is still unreadable

Switch to text mode, which prioritises ink-to-paper contrast. If it remains unreadable, rescan the original at 300 DPI rather than trying to rescue a low-resolution copy.

Colours look wrong

Strong contrast adjustment shifts colour. Reduce the contrast setting, or use text mode for documents where colour accuracy does not matter.

Processing is slow

Enhancement is computationally heavy and runs on your device. Large images take longer on phones than on desktops.

Enhancing without overdoing it

• Make small adjustments and compare against the original frequently.
• Apply noise reduction before sharpening, since sharpening amplifies any grain that is still present.
• Use text mode for anything you intend to run through OCR — it improves recognition accuracy noticeably.
• Start from the highest-quality original you have rather than a compressed copy.
• Enhance once. Repeated passes accumulate artefacts quickly.
• For documents, rescanning properly at 300 DPI always beats enhancing a bad scan.

Your file never leaves your device

Enhancement runs inside your browser, so personal photographs and document scans are never uploaded anywhere. This matters most when the document is personal — an Aadhaar or PAN scan, a bank statement, a salary slip, a medical report or a signed contract. With a server-based converter you are trusting an unknown company with that file. Here there is nothing to trust, because the file is never transmitted anywhere.

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Image Quality Enhancer — more questions