1Upload the HEIC images you want resized — work from the largest original you have rather than from a copy you already shrank once.
2Type a target width, a target height or a percentage, and leave the aspect-ratio lock on unless you deliberately want stretching.
3Run the resize; every file in the batch is taken to the same target in a single pass.
4Download the resized HEIC file, or the whole set together as one archive.
Resize HEIC FAQ
How does Resize HEIC change the dimensions?
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Concretely, the HEVC image is decoded, resampled with Lanczos and re-encoded, which is one generation of loss; going to a lossless target instead avoids that if you are still editing. You give it a target width, a target height or a percentage, and it works from the original rather than from a previously resized copy.
Can I keep the aspect ratio, or force exact dimensions?
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Both. Lock the ratio and one dimension is derived from the other, which is what you want almost always. Unlock it and you get exactly the numbers you typed, at the cost of stretching — useful for a fixed slot, wrong for a photograph.
Does the source format affect the result of a resize?
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It does. this format is read and written by the same streaming pipeline as everything else we support. That is what decides whether shrinking the file is purely a question of pixels or also a question of re-encoding.
Is there anything specific to HEIC I should watch for?
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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. Worth checking before you resize a file you will not be able to regenerate.
What is the most common mistake when resizing HEIC images?
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Upscaling. Enlarging cannot invent detail that was never captured, so the result is a soft version of the original at a bigger size. Always resize down from the largest source you have, and resize once rather than in stages.
What dimensions should I actually target?
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Match the slot it will live in. A full-width web hero rarely needs more than 1920 pixels wide, a content image 1200, a thumbnail 400, and doubling those numbers covers high-DPI screens. Anything beyond that is bytes nobody sees.
What can I upload to Resize HEIC?
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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 Resize HEIC?
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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 Resize HEIC lower the quality of my HEIC images?
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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 Resize HEIC on several HEIC images at once?
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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?
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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 Resize HEIC cost anything?
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No. Resize HEIC is free, no account, no watermark, and no Apple device required at any point. Uploads are deleted shortly after the job finishes.
