Tool
Red Eye Remover
Fix the red-eye flash effect in your photos for free. Upload a single shot or an entire batch from an event and every one is corrected automatically in your browser - your photos are never uploaded anywhere.
Fix Red Eyes In Your Photos
Upload one photo or a whole batch and every red-eye is fixed automatically - no spots to review or click through. Missed one? Just tap directly on it to fix it manually.
Drop your photos here
JPG, PNG, WebP, or HEIC - up to 30 at once, processed entirely in your browser and never uploaded.
How This Compares to Other Online Red-Eye Tools
Most red-eye removers you'll find online - including the well-known ones - require uploading your photo to their servers, cap how many images you can fix for free, or push you toward creating an account. This tool was built to remove every one of those catches.
Most online red-eye tools
- closeYour photo is uploaded to their server to be processed
- closeFree tier limited to a few images per month
- closeAccount or sign-up often required for full features
- closeOne photo at a time unless you pay for an API/desktop app
- closeSome add a watermark on the free plan
Crest Convert
- checkRuns entirely in your browser - photos are never uploaded
- checkCompletely free with no limit on how many photos you fix
- checkNo account, no sign-up, ever
- checkFix a whole batch of photos from an event in one click
- checkNo watermark, ever, on any photo
The correction itself is also built to avoid the classic giveaway of cheap red-eye tools: a flat, lifeless black circle where the pupil used to be. This tool deliberately leaves the eye's catchlight - the small white sparkle that makes eyes look alive - untouched, so the result looks like a natural pupil rather than a painted-over dot.
Why Red-Eye Happens
Red-eye occurs in low-light flash photography. When a room is dim, your subject's pupils dilate wide to let in more ambient light. If a flash fires close to the camera lens, that burst of light travels straight through the dilated pupil, hits the blood-rich layer at the back of the eye, and bounces a saturated red reflection back into the lens before the pupil has any time to constrict.
The result is a small, sharply-defined red circle sitting on top of an otherwise natural photo - which is exactly why targeted correction works so well: only the pupil needs to change, not the rest of the eye or face.
How This Tool Fixes It
Rather than sending your photo to a server, this tool scans the image directly in your browser for pixel clusters matching the red-eye signature - a strong red channel spike with the green and blue channels comparatively dormant. Once found, it darkens just those pixels back toward a natural pupil tone, blending the edges smoothly and deliberately skipping any bright near-white pixels so the eye's catchlight (the small sparkle that makes eyes look alive) is preserved.
If a red-eye is missed - which can happen with side-angled faces, glasses glare, or unusually dark lighting - just tap directly on it and the same correction is applied at that point. Nothing is ever uploaded, so there's no wait and no privacy concern with client or family photos.
Common Uses
Event & Party Photos
Upload the whole batch from a wedding, party, or reception and fix every flash-lit photo at once.
Family Snapshots
Quick fixes for candid indoor photos before sharing or printing.
Old Photo Scans
Point-and-shoot film cameras placed the flash right next to the lens, so scanned prints often need this fix.
Portraits & Headshots
A clean, natural-looking correction before using a photo professionally.
Need to resize or convert the photo next?
Once your red-eye is fixed, you can convert the photo to another format or resize it to a specific aspect ratio for free with Crest Convert - everything runs in your browser, so your files never get uploaded anywhere.
Frequently Asked Questions
How does this red eye remover work?
As soon as you upload a photo, it's scanned for the distinctive red flash reflection in pupils and corrected automatically - there's no list of "maybe" spots to review or click through. Just the fixed photo. If it misses a spot, tap directly on it to fix that eye manually.
Is my photo uploaded to a server?
No. Detection and correction both run locally in your browser using the Canvas API - your photo is never sent anywhere. This also means it works offline once the page has loaded, and there's no wait for a server round-trip.
Can I fix red-eye in multiple photos at once?
Yes. Upload as many photos as you like (up to 30 at a time) and each one is automatically corrected as it's added - no extra clicks needed. You can still click into any individual photo to make a manual touch-up before downloading everything as a ZIP.
Is there a limit on how many photos I can fix for free?
No. There's no daily or monthly cap, no account, and no watermark - use it as many times as you need.
Why does red-eye happen in flash photos?
In low light, pupils dilate to let in more light. When a flash fires, light passes through the dilated pupil and reflects off the blood-rich layer at the back of the eye, bouncing a red glow straight back into the camera lens before the pupil has time to constrict.
Will it work on pet photos?
This tool is tuned for human red-eye specifically. Pets have a reflective layer behind the retina that usually produces a green, yellow, or blue glow rather than red, which needs different color targeting to correct properly.
What if the automatic detection misses an eye or picks the wrong spot?
Tap directly on the red-eye it missed and the same correction will be applied at that exact point. If a fix doesn't look right, hit Reset to start over from the original photo.
What file types and sizes are supported?
JPG, PNG, WebP, and HEIC (the format iPhones save photos in) up to 20MB each. HEIC files are decoded right in your browser, so they're still never uploaded anywhere. You can also choose the output format and, for JPG and WebP, adjust the compression quality before downloading.