FAQ
Why do faces look stretched near the edges of a photo?
A wide-angle camera fits a large scene into a flat image. As the viewing angle grows, objects near the edges are spread across more pixels, so a face there can look wider than the same face near the centre. This is a normal result of perspective projection, not a flaw in the person.
How does the correction work?
It is geometry, not generative editing. Facelign finds faces, reads the camera’s field of view when available, and builds a smooth local perspective correction around faces that need it. The photo is warped once, without generating or replacing facial details.
Is the Facelign website really free?
Yes. The website is free to use and needs no account. File-size, image-size, daily-capacity, and rate limits keep the public service affordable, so it may occasionally ask you to try again later.
How do you use my photos, and how long do you keep them?
On the website, your photo is used only to perform the correction. The original is deleted after processing finishes; generated results are available through short-lived private links and have a one-day automatic deletion rule as a safety net. Photos are not used for training, advertising, or identification. The Android app is different: it corrects photos on your device and never uploads them at all. See the Privacy page for the full explanation.
How is the Android app different from the website?
The app corrects photos entirely on your device, so nothing is uploaded. It works with no connection and no account. The website, by contrast, corrects in the cloud and deletes your photo right after processing. The correction itself is the same geometry on both. The app also preserves Ultra HDR, which the website does not.
Do I need to pay for the Android app?
You can try the app at no cost. During the trial, corrected photos are saved with a watermark. A one-time purchase unlocks watermark-free saves. The app always works offline, needs no account, and shows no ads.
How do I keep the original filename and photo tags using web browser on Android?
On Android, a browser or photo provider often hands the website a renamed, metadata-reduced copy. To keep the source filename and the tags Facelign can preserve, add facelign.com to your home screen and share photos to it, rather than picking a photo from inside the website.
- Open facelign.com in Chrome.
- Open the Chrome menu and choose Install app or Add to Home screen.
- Open the original photo in Photos, Gallery, or Files.
- Tap Share, then choose Facelign. Correction begins automatically.
For the most reliable results on Android, use the Facelign app instead. It works on the file directly, offline, with no upload.
Which photo formats are supported?
Facelign accepts JPEG, PNG, WebP, HEIC, and HEIF images. Corrected JPEG input remains JPEG; HEIC, HEIF, PNG, and WebP corrections are delivered as JPEG.
Is the original image quality preserved?
The full pixel dimensions are preserved. Corrected images are encoded as high-quality JPEGs, so they are not bit-for-bit or lossless copies. HEIC, HEIF, PNG, and WebP inputs are converted to JPEG, and special HDR or motion data is not retained.
Are photo tags preserved?
Facelign preserves EXIF information, including GPS when present, and the colour profile in corrected JPEGs when the source format provides them. Photos are saved the right way up, even when the original used a rotation tag. XMP and format-specific auxiliary metadata are not guaranteed.
Why are some tags missing after correction?
Sometimes the browser, photo provider, cloud gallery, or another app supplies a privacy-filtered or exported copy instead of the original file. Facelign cannot restore metadata it never receives. On Android, install Facelign and share the original from Photos, Gallery, or Files. On other platforms, select the original file rather than a copy previously exported through social media.
Why does a mobile upload sometimes have a strange filename?
The browser or photo provider chooses the filename it gives to a website and may substitute a generated name for privacy or compatibility reasons. Facelign preserves the name it receives as the basis for the corrected filename, but cannot recover a name that was not provided. On Android, the app is the reliable way to retain the source filename.
Why does the website sometimes say it is busy?
The website uses a deliberately limited amount of computing capacity so the service can remain free and resist automated abuse. Your browser retries short bursts automatically. If demand stays high or the daily allowance has been reached, wait a little and try again later. The Android app corrects on your own device and is never busy.
Why do I see a message about missing field-of-view information?
The correction normally uses the 35 mm-equivalent focal length stored in the photo’s EXIF data. Older photos, screenshots, edited exports, and images downloaded from social media may not contain it. Facelign then uses a conservative default field of view of 80° and tells you that it has done so.
Why can results be imperfect when a face touches the edge?
Correction needs source pixels on both sides of a face so it can redistribute them naturally. At the edge of the frame, some of those pixels were never captured. Facelign does not invent missing facial or background content, so an extreme edge face can remain imperfect or show stretching near the boundary.
What are the known limitations?
Facelign corrects the primary still image only. Live Photos, Android Motion Photos, HEIC sequences, and depth maps are not preserved. The website also does not keep gain maps or Ultra HDR, though the Android app preserves Ultra HDR. HEIC output is not currently supported. Images are limited to 25 MB and 32 megapixels, and automatic detection may miss small, obscured, or unusual faces.
I have an idea or question. How can I get in touch?
Contact details are on the About page.