1Upload the HEIC images you want to mark, already at their final size — watermarking comes after resizing, not before it.
2Upload a transparent PNG logo or type your text, then choose the font, the colour and the opacity.
3Set the position, or switch to a tiled repeat when a single corner mark would be too easy to crop away.
4Download the watermarked HEIC file; nothing else is added to it.
Watermark HEIC FAQ
How does Watermark HEIC place the mark?
+
Concretely, the HEIC is decoded, the mark is composited and the result is re-encoded, so the watermark is baked into the pixels rather than living in metadata anyone can strip. You control the position, the size and the opacity, and the same settings are applied consistently across everything you upload.
Can I use my own logo, or only text?
+
Either. Upload a transparent PNG logo, or type text and choose the font, colour and opacity. A tiled repeat is available when one corner mark is too easy to crop away.
Does the file format affect how the watermark comes out?
+
It does. this format is read and written by the same streaming pipeline as everything else we support. That governs how cleanly a semi-transparent mark can be blended into the underlying content.
Anything specific to HEIC worth knowing?
+
Yes — HEIC decoding needs the HEVC licence stack that Windows and most browsers ship without, which is usually the real reason the file is here at all. It affects when in your workflow the mark should be applied.
Does a watermark actually protect my work?
+
It deters casual reuse and it credits you; it is not security. A corner mark can be cropped and a faint one can be painted out. If protection matters, a large semi-transparent mark across the subject is far harder to remove than a discreet one in a corner.
Should I watermark before or after resizing?
+
After. Watermark the final deliverable at its final size, so the mark stays legible and proportionate. Watermarking a master you will process again means the mark gets resampled and compressed along with everything else.
What can I upload to Watermark HEIC?
+
HEIC and HEIF files straight off an iPhone or iPad, including 10-bit captures. You do not need the HEVC codec installed locally — the decoding happens on our side, which is usually the entire reason to do this in a browser.
Is there a file size limit on Watermark HEIC?
+
Yes: free accounts process images up to 25 MB each, which comfortably covers iPhone HEIC captures — HEIC is roughly half the size of the equivalent JPG. A 12-megapixel HEIC is typically 1.5-3 MB, so the limit only becomes relevant for burst exports or 48 MP ProRAW-adjacent captures.
Will Watermark HEIC lower the quality of my HEIC images?
+
HEIC stores a HEVC-coded image that is already very efficient, so the honest answer is that any re-encode costs a little. Where the operation can be applied without a full decode-encode cycle we do that; where it cannot, HEIC has enough headroom that the result is visually indistinguishable at normal viewing sizes.
Can I run Watermark HEIC on several HEIC images at once?
+
Yes, and an iPhone export is usually exactly the case for it — drop the whole camera roll selection in and it processes in parallel with one set of settings.
Does the Live Photo / depth data survive?
+
No. The paired motion clip and the depth map are Apple container extras rather than part of the still image, and they do not survive processing. The still itself, its EXIF and its colour profile do.
Does Watermark HEIC cost anything?
+
No. Watermark HEIC is free, no account, no watermark, and no Apple device required at any point. Uploads are deleted shortly after the job finishes.
