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Supports: AV1, MP4, MKV, WEBM
A .av1 file holds a raw AV1 bitstream — the Alliance for Open Media's royalty-free video coding, published as a specification in 2018 — with no container and no audio around it. JPG holds one still image. This tutorial covers the bridge between them: pulling either a single frame at an exact timestamp or a whole series of frames sampled across the clip, and controlling how sharp and how large those stills come out. By the end you will know which Frame Selection mode you want, how to type a timestamp the tool understands, and which of the quality controls actually matters.
.av1 file onto the page or click "+ Add Files" to browse. The file is sent over an encrypted connection and decoded on our servers; several clips can be queued together.2.100 for 2 seconds and 100 milliseconds. For Multiple Screenshots, choose a Capture Rate between one frame every 0.1 seconds and one every 10 seconds.This is where AV1-to-JPG conversions go right or wrong, because the two modes produce completely different output from the same upload.
| Specific Frame | Multiple Screenshots | |
|---|---|---|
| What you get | One JPG | One JPG per sampled moment |
| Control | Time (seconds), starting at 0 | Capture Rate dropdown |
| Value format | Seconds with decimals: 0.5, 12, 2.100 |
0.1s, 0.2s, 0.3s, 0.5s, or 1-10 seconds per frame |
| Default | Selected, with the time set to 0 (the opening frame) | One frame per second when chosen |
| Use it for | A thumbnail, a poster frame, one readable shot of on-screen text | Contact sheets, frame-by-frame review, feeding an image pipeline |
| Watch out for | Landing next to the moment you wanted — nudge by 0.1 |
Frame count: a 2-minute clip at 1 fps is 120 images |
The mental model that keeps this simple: Specific Frame answers "what did it look like at this moment", while Multiple Screenshots answers "show me the clip as a strip of stills". If you find yourself typing a timestamp over and over to hunt for a moment, switch to Multiple Screenshots at 0.5 or 1 second per frame, find the frame you want in the batch, then go back and grab that exact time at full quality.
| Control | Choices | Default | What it actually does |
|---|---|---|---|
| Quality preset | Highest, Very High (Recommended), High, Medium, Low, Very Low, Lowest | Very High (Recommended) | Sets how hard JPEG quantizes each 8×8 block — lower presets mean smaller files and more visible ringing around edges |
| Specific file size | A value in bytes, kilobytes, or megabytes, plus an Auto Scale toggle | Off | Caps the output at a size you name, trading quality (and optionally dimensions) to get there |
| Image resolution | Keep original, Resolution Percentage, Preset Resolutions (16P to 4320p), Width, Height, Width x Height | Keep original | Changes the pixel dimensions of the still before it is encoded |
| File extension | JPEG or JPG | JPG | Renames the output only — both are the same JPEG file format |
Leave the preset on Very High (Recommended) unless something downstream forces your hand. JPEG is lossy at every setting, so each step down is detail you cannot recover from the still afterwards; when a hard size limit is the problem, Specific file size hits the target more predictably than guessing at presets.
0.1 and convert again..av1.Some files will not give up their frames. DRM-protected or encrypted video cannot be decoded for capture at all. A truncated or partially downloaded .av1 may decode up to the point it was cut off and fail past it — try a timestamp inside the intact portion. And if your AV1 video is not a bare .av1 file but AV1 inside an .mkv, .webm, or .mp4, use the converter for that container instead — MKV to JPG does the same frame extraction for Matroska files. If you need to trim, re-time, or repair the video before pulling stills, convert it to a working container first with AV1 to MP4 and extract from the result.
Both — you choose with Frame Selection. Specific Frame returns one JPG at the timestamp typed into Time (seconds), and because that box starts at 0, converting without touching it gives you the opening frame. Multiple Screenshots samples the clip at the Capture Rate you pick and returns one image per sampled moment.
It tracks the source, then loses a little more. JPEG is lossy, and the AV1 frame it starts from is itself the output of a lossy video codec, so a still can never be crisper than that instant of footage. A slow, well-lit, high-bitrate moment extracts beautifully; a fast pan from a heavily compressed clip will not. Keeping the preset on Very High (Recommended) and the resolution on Keep original preserves as much as there is to preserve.
Use JPG for ordinary photographic scenes where a small file matters — it compresses smoothly and opens everywhere. Use AV1 to PNG when the frame contains text, UI, charts, or hard-edged graphics, or when you plan to edit and re-save the still repeatedly, because PNG is lossless and does not accumulate compression damage with each save. If a downstream tool specifically wants uncompressed pixels, AV1 to BMP writes a raw bitmap instead.
In seconds from the start of the clip, with a decimal point for fractions. 5 is five seconds in, 0.25 is a quarter of a second, 90 is a minute and a half, and 2.100 is 2 seconds and 100 milliseconds. There is no minutes-and-seconds format on this control, so convert first: 1:45 is 105.
Nothing but the file name. The File extension dropdown offers JPG and JPEG, and both produce exactly the same JPEG-format image — the two spellings are a leftover from the three-character extension limit of early Windows and DOS. Pick whichever your downstream software or house style expects.
Use Specific file size under Image Compression. Name a target in bytes, kilobytes, or megabytes and the encoder works down to it, and turn on Auto Scale if you are willing to let it reduce the dimensions as well as the quality to hit the number. That is more reliable than stepping down quality presets and re-checking the size by hand.
This page is set up for files with the .av1 extension, which are raw AV1 bitstreams. AV1 is a codec rather than a container, so it far more often ships inside .mkv, .webm, or .mp4; for those, use the converter that matches the wrapper — MKV to JPG, for instance — and you will get the same frame-extraction controls.
It is uploaded over an encrypted connection, decoded on our servers to produce the stills, and deleted automatically a few hours later — never shared, never made public, with no sign-up and no watermark. The JPGs you download are yours to keep; nothing about them is watermarked or tied back to an account.