AVI to HEIF Converter

AVI to HEIF: Pulling a Still Frame Out of a Video

This is a frame grab, not a video conversion. You choose a moment in an AVI clip — or a sequence of moments — and each one comes back as a separate HEIF still image. HEIF is the ISO-standard container that Apple made the default for iPhone photos, and it stores a picture in an HEVC-coded form that is materially more efficient than JPEG. Nothing about the clip's motion, duration, or sound survives the trip: the output is one image per selected frame.

HEIF Format at a Glance

HEIF vs the Other Formats You Could Extract To

If the still has to open on an unknown machine, AVI to JPG is the safe pick, and AVI to PNG gives you a lossless frame for editing work. Already have a HEIF that something refuses to open? Run it through HEIF to JPG.

How to Convert AVI to HEIF

1. Upload Your AVI File: Drag and drop your clip or click "Add Files" to select one or more .avi videos. Batch is supported, so several clips can be queued in one pass.
2. Choose the Frame Selection Mode: Frame Selection starts on Specific Frame with Time (seconds) at 0, which grabs the very first frame. Type a different timestamp — 8.5 for the 8.5-second mark — to grab a specific moment, or switch to Multiple Screenshots to sample the clip at a fixed Capture Rate, which starts at one frame per second.
3. Set Quality and Size: Under Image Compression the Quality Preset starts at "Very High (Recommended)"; pick "Highest" for the cleanest still or step down for smaller files, and Specific file size is there when you need to hit a byte target. Image resolution starts on Keep original and also offers Resolution Percentage, a Preset Resolution, or an exact Width x Height.
4. Convert and Download: Click Convert. Each selected frame becomes its own .heif image, and a multi-frame run can be downloaded as a single archive. No sign-up, no watermark.

What Happens Between Upload and Download

The extraction runs in two stages, and knowing the shape of it explains most of the quality questions people have. First the video decoder seeks to the timestamp you asked for and writes that frame out as a lossless PNG, so nothing is thrown away at the point of capture. Then that PNG is encoded to HEIF at the quality and resolution you selected. Only the second stage is lossy, which is why a high Quality Preset keeps an extracted still visually equivalent to the frame as the source AVI stored it. In Multiple Screenshots mode the same two stages run once per sampled frame, producing a set of independent images rather than any kind of sequence file.

Frequently Asked Questions

Will the extracted HEIF open on Windows or Android?

Not reliably without help, and this is the single most common regret after choosing HEIF. Apple devices handle it natively. Windows 10 and 11 need the free HEIF Image Extensions package from the Microsoft Store before Photos and File Explorer will show a preview. Android support depends on the gallery or messaging app, and many of them silently re-encode to JPEG when you share. In browsers only Safari 17 and later decode HEIF at all — Chrome, Firefox, and Edge have no native decoder. If the image has to open somewhere you do not control, extract to JPG instead.

Is .heif the same thing as .heic?

Practically, on Apple devices, yes. HEIF is the container defined by ISO/IEC 23008-12, and it can in principle hold images coded several ways. .heic is the extension used when the images inside are HEVC-coded, which is what Apple writes and what almost every HEIF file in circulation contains. This converter writes HEVC-coded images too, so a .heif produced here and a .heic from an iPhone hold the same kind of payload. If an app insists on one extension, renaming the file is usually enough.

Which frame do I get if I leave the settings alone?

The first frame of the clip. Frame Selection starts on Specific Frame with Time (seconds) set to 0, so an untouched conversion returns frame zero. That is often not what you want — the opening frame of a recording is frequently black, a fade-in, or a camera still settling. Type a timestamp with a decimal for sub-second precision, such as 12.45, to land on the moment you actually care about.

Can I pull several frames out of one AVI at once?

Yes — switch Frame Selection to Multiple Screenshots and pick a Capture Rate. The dropdown runs from one frame every 0.1 seconds at the dense end, through the default of one frame per second, down to one frame every 10 seconds for a sparse contact sheet. Every sampled moment becomes its own HEIF file, and you can download the whole set together rather than one at a time. This is the mode for storyboards, thumbnail sheets, and frame-by-frame reference sets.

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

Meaningfully smaller, but there is no fixed ratio and anyone quoting one is generalising. The saving comes from how HEVC codes a still image: it predicts blocks from their already-decoded neighbours within the same picture, where JPEG independently transforms each 8x8 block with no prediction at all. That advantage is largest on detailed, textured frames and smallest on flat, simple ones, and it also depends on which quality preset you pick on each side. The honest summary is that HEIF stores a comparable-looking still in less space than JPEG, by an amount your own content decides — so if size is the reason you are here, extract the same frame both ways once and compare.

How sharp can a frame extracted from an AVI be?

Only as sharp as the frame in the source. Most AVI files in circulation hold already-compressed DivX, Xvid, or MJPEG video, frequently at standard definition and sometimes interlaced, so a still inherits whatever detail, blocking, and motion blur that frame already had. Re-encoding to HEVC cannot invent detail. Leave Image resolution on Keep original and the Quality Preset high to preserve everything the source frame offers; raising the resolution above the native size only interpolates.

Does the still keep anything else from the video — audio, timing, or metadata?

No audio, because a still image has no audio track. No timing either: the output is a standalone picture with no relationship to where it sat in the clip, so name your files if the position matters. Container-level metadata from the AVI does not carry across in any meaningful way, since the frame is decoded to raw pixels and re-encoded as a new image. If you want the soundtrack as well, extract it separately with AVI to MP3.

What happens to my uploaded AVI, and is the original changed?

Your file is uploaded over an encrypted connection, the requested frames are read from the copy on our servers, and new HEIF files are written from them. Both the upload and the results are deleted automatically a few hours later, with no sign-up, no watermark, and no sharing or public listing. The .avi on your own device is never modified — extraction only ever reads from it.