After
Before
Enhance detail and clarity
Show the difference between a soft, low-detail image and a clearer enhanced result.
- HD
Enhancement demos should be honest: show clearer detail without promising unrealistic reconstruction.
Sharpen Image
Sharpening increases perceived edge contrast. It can make slightly soft photos look clearer, but it cannot recover detail that was never captured and can exaggerate noise or halos.
or drag and drop images here
Fast async jobs
No install required
Temporary files
Batch uploads
See what this tool changes
Accepted files
.png, .jpg, .jpeg, .webp
Output formats
same_as_input, jpg, png, webp
API endpoint
/enhance
Use this tool from your app
Submit files to /enhance, poll the job endpoint, then download outputs programmatically.
What it changes
Sharpening increases perceived edge contrast. It can make slightly soft photos look clearer, but it cannot recover detail that was never captured and can exaggerate noise or halos.
How it works
Sharpening usually estimates high-frequency detail by comparing the image with a blurred version, then adds a controlled contrast boost around edges.
Performance
Moderate cost. It is usually fast enough for web-sized images, but high-radius sharpening on large files can become expensive.
Best for
- photos after resizing
- soft product shots
- scanned text
- web thumbnails
Limitations
- very noisy photos
- already oversharpened JPEGs
- faces with compression artifacts
Common artifacts
- bright/dark halos
- crunchy skin texture
- amplified noise
- jagged text edges
Settings
slider
amount
Controls how strongly edge contrast is boosted.
slider
radius
Controls how wide the edge effect spreads.
boolean
strip_metadata
Removes metadata from generated output when supported.
FAQ
Can sharpening restore lost focus?
Only a little. Sharpening improves perceived crispness but cannot recreate detail that was never captured.
Why did sharpening make noise worse?
Noise is high-frequency detail too, so sharpeners often boost it unless denoise is applied first.
Can sharpening fix a blurry photo?
Only slightly. Sharpening can improve edge perception but cannot truly restore out-of-focus or motion-blurred detail.
Why does sharpening create halos?
Strong edge contrast can create bright/dark outlines around edges, especially at high radius or amount settings.
Should I sharpen before or after resizing?
Usually sharpen after final resizing because resizing changes edge detail.
Does sharpening increase noise?
Yes, it can make noise and compression artifacts more visible.
Is Sharpen Image free to use?
The public ImageHQ frontend is built for fast browser-based image jobs backed by compact async APIs.
Are uploaded files temporary?
ImageHQ jobs use temporary file retention for processing and downloads.
References
filter CSS property
MDN Web Docs - browser_documentation
ImageMagick command-line options
ImageMagick - library_documentation
Understanding Success Criterion 1.4.3: Contrast (Minimum)
W3C WAI - standards_body
Vips.Image.sharpen
libvips - library_documentation