Blur & Sharpen Image
Blur a busy background behind a product shot, or add a little edge definition to a soft scan. The sharpen filter uses a convolution kernel and blends with the original so the result does not turn crunchy.
Key facts
- Category
- Image Utilities
- Price
- Free
- Account
- Not required
- Processing
- In your browser
- Input
- Local files or pasted data
- Platform
- Modern desktop and mobile browsers
What it does
Blur a busy background behind a product shot, or add a little edge definition to a soft scan. The sharpen filter uses a convolution kernel and blends with the original so the result does not turn crunchy.
Soften backgrounds or recover edge detail with a local blur and sharpen filter.
How to use it
Here is the short version of using Blur & Sharpen Image.
- Open the image — The preview is rendered at screen size for speed.
- Choose blur or sharpen — Increase the radius for a softer blur, or the strength for sharper edges.
- Export at full resolution — The same filter is applied to the original pixels, not the preview.
Features that matter
What Blur & Sharpen Image does well.
- Nothing leaves your device — The work happens in your browser tab. There is no upload endpoint in this app, so your files and text cannot be stored, logged or seen by us.
- No upload wait — You skip the round trip to a server entirely. Results are limited by your own CPU, not by network speed or queue size.
- Free, no account, no quotas — No sign-up wall, no watermark, no daily limit. Optional accounts only exist to save favourites and presets across devices.
Frequently asked questions
Is my image safe to use here?
Yes. This tool runs entirely in your browser using JavaScript. Nothing you paste or open is sent to a server, and the page keeps no copy after you close it.
Do I need to create an account?
No. Every tool is fully usable without signing in. An account only adds saved favourites and reusable presets.
Does it work on a phone?
Yes. The interface is mobile-first with large touch targets and a stacked layout, so it works on phones and tablets as well as desktops.
Can sharpening recover a blurry photo?
Only slightly. Sharpening increases local contrast at edges; it cannot recreate detail that was never captured. Strong settings produce halos and noise.
Is the blur Gaussian?
This version uses a fast separable box blur, which approximates a soft blur without the cost of a true Gaussian kernel on large images.
Open Blur & Sharpen Image
Try it now — it runs in your browser and needs no account.
Open the tool