AVI to HEIF Converter

Extract an AVI Frame as HEIF

Grab a single still from an AVI video — or a series of stills — and save it as HEIF, Apple's space-efficient still-image format. You pick the exact moment by timestamp, and each frame comes out as a separate .heif (HEVC-coded) image that's roughly half the size of the equivalent JPEG. This pulls frames, not the whole clip: the output is one image per frame, not a playable video.

How to Convert AVI to HEIF

1. Upload Your AVI File: Drag and drop or click "+ Add Files" to select one or more .avi videos. Batch is supported, so several clips can be queued in one pass.
2. Pick Frame Selection: Choose Specific Frame and enter the moment in Time (seconds) — e.g. 8.5 for the 8.5-second mark — to get one still. Or choose Multiple Screenshots to extract a sequence; the separate stills are returned together as a ZIP.
3. Set Quality Preset (Optional): Quality Preset defaults to Very High (Recommended). Pick Highest for the cleanest still, or step down to Medium / Low for smaller files. Under Image resolution you can keep original, scale by percentage, or set an exact Width x Height.
4. Convert and Download: Click Convert. Each selected frame becomes its own .heif image. No sign-up, no watermark.

HEIF vs JPG vs PNG for an Extracted Frame

If you need a still that opens anywhere without fuss, AVI to JPG is the universal pick; AVI to PNG gives you a lossless-style frame for editing. Reach for HEIF when the destination is an Apple photo library and disk space matters.

Frequently Asked Questions

Will the extracted HEIF open on Windows or Android?

Not always without help. HEIF decodes out of the box on iOS 11+, iPadOS, and macOS High Sierra (10.13) or later, where Apple adopted it as the default still format (Apple Support). Windows 10 and 11 need the free HEIF Image Extensions from the Microsoft Store, and many Android gallery apps still re-encode to JPEG on share. In browsers, only Safari 17+ renders HEIF natively — Chrome, Firefox, and Edge have no native decoder (caniuse.com/heif). If the image has to open everywhere, convert the frame to AVI to JPG instead, or run the HEIF through HEIF to JPG afterward.

How sharp can the extracted frame be?

The frame can only be as sharp as the source video. AVI is a 1992 Microsoft container (Microsoft Learn) that usually holds already-compressed, interlaced, or standard-definition footage, so a still pulled from it inherits whatever detail and motion blur the original frame has. Re-encoding to HEVC won't invent sharpness that isn't there — keeping the resolution on Keep original and quality on Highest preserves the most detail the source frame can offer.

How much smaller is a HEIF still than the same frame as JPEG?

Apple's guidance is that HEIF uses less storage than JPEG at the same visual quality, without publishing a fixed percentage. Independent comparisons usually put a HEIF still at roughly 40–60% of the JPEG file size for the same frame, with the gap widening on detail-heavy images. The savings come from HEVC's intra-frame prediction, which is far more efficient than JPEG's 8×8 DCT blocks.

Can I pull several frames at once from one AVI?

Yes. Choose Multiple Screenshots and set a capture rate — anywhere from one frame every 0.1 seconds (10 per second of footage) up to one every 10 seconds. Each captured moment becomes a separate HEIF, and the set is delivered as a ZIP. In our testing, a 10-second AVI captured at one frame per second produced 10 individual .heif stills in a single download.

How are my uploaded files handled, and is the original AVI changed?

Your AVI is uploaded over an encrypted connection, the requested frames are read from a copy on our servers, and new HEIF files are written from them. Files are deleted automatically a few hours after conversion — never shared or made public. Your original .avi on your device is never modified.