Image Sharpener
Image Sharpener is a free online image tool for changing PNG, JPG, JPEG, WEBP, and BMP files into PNG files. Image Sharpener accepts 4 MIME types, returns image/png, includes 1 setting, and runs in your browser on the device.
Drop .png / .jpg / .jpeg / .webp / .bmp file here
or click to choose — or paste an image with ⌘V / Ctrl+V
Options
Key facts
- Input
- 5 formats: PNG, JPG, JPEG, WEBP, and BMP (image/png, image/jpeg, image/webp, image/bmp)
- Output
- PNG (image/png)
- Runtime
- your browser on the device
- Settings
- 1 control: Strength
- File mode
- 1 input file creates 1 output file
- Cost
- $0, no account required
How to use Image Sharpener
- 1
Open your PNG, JPG, JPEG, WEBP, BMP file
Drop your PNG, JPG, JPEG, WEBP, BMP file onto the page, or click to browse and pick one from your device.
- 2
Choose options
Adjust the conversion options to suit your needs. Defaults work well for most inputs.
- 3
Convert and download
Click Convert. Your PNG file is ready to download in seconds.
Image Sharpener details
First, Image Sharpener reads PNG, JPG, JPEG, WEBP, and BMP source files and prepares PNG output for the image workflow. Next, The visible controls are Strength. Additionally, Files and text stay in the browser session.
Drop in a slightly soft image and download a sharper version. Applies a classic 3×3 sharpening convolution kernel ([0,-1,0; -1,5,-1; 0,-1,0]) blended with the original by the strength you choose. Strength 0 leaves the image unchanged; 1 applies the full sharpening filter. Output is always PNG so transparency is preserved. Conversion runs locally in your browser; files never leave your device.
Common searches
- image sharpen
- sharpen image
- image sharpener
- sharpen blurry image
- image sharpening tool
- photo sharpener
Related tools
Tools that work with the same formats — most users open one of these next.
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Invert (negate) the colors of any image — runs entirely in your browser.
Blur Image
Blur any image with an adjustable radius — fast separable box blur, runs in your browser.
Rotate Image
Rotate an image 90°, 180°, or 270° — lossless, runs entirely in your browser.
Image Pixelator
Pixelate any image — drag the block size, runs in your browser.
Add Text to Image (Meme Maker)
Slap top + bottom caption text on any image — classic meme style, runs in your browser.
Image Cropper
Crop any image (PNG, JPG, WebP, GIF, BMP, AVIF) right in your browser — drag a box, hit crop.
Frequently asked
What is Image Sharpener?
Image Sharpener is a free online image tool for changing PNG, JPG, JPEG, WEBP, and BMP files into PNG files. Image Sharpener accepts 4 MIME types, returns image/png, includes 1 setting, and runs in your browser on the device.
What files does Image Sharpener accept and create?
Image Sharpener accepts PNG, JPG, JPEG, WEBP, BMP files (image/png, image/jpeg, image/webp, image/bmp) and creates PNG files (image/png). The page includes 1 setting: Strength.
Do my files and data stay private?
Yes. Image Sharpener runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use Image Sharpener?
Open Image Sharpener, drop in your PNG, JPG, JPEG, WEBP, BMP file, choose any options, and click Convert. Your browser does the work locally and produces a PNG file you can save right away.
What is the maximum file size for Image Sharpener?
Because Image Sharpener runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.