WMV to HEIF Converter

How to Convert WMV to HEIF Online

1. Upload Your WMV File: Drag and drop or click "+ Add Files" to select one or more .wmv clips. Batch is supported, so a folder of legacy Windows Media recordings can be processed in one pass.
2. Pick Quality Preset and Image Resolution: The default is Very High (Recommended), which targets near-source HEVC still-image quality. Drop to High or Medium to shrink the output further. Under Image resolution you can keep the original frame size, use Resolution Percentage to scale (e.g., 50 %), pick a Preset Resolution (4320p down to 144p), or enter a custom Width x Height with aspect ratio locked.
3. Choose Frame Selection (Optional): Use Specific Frame plus a Time (seconds) value to grab a single still at, say, 12.5 s, or switch to Multiple Screenshots to extract several frames across the clip — useful for storyboards, scrubbing through interview footage, or building a thumbnail sheet.
4. Convert and Download: Click Convert. Frames are decoded and re-encoded to HEIF (HEVC-encoded .heif) in your browser session — no sign-up, no watermark, files are not retained server-side after download.

Why Convert WMV to HEIF?

WMV is a Microsoft codec family that has shipped inside ASF containers (.wmv, .asf) since 1999, with WMV 9 standardized as SMPTE 421M (VC-1) in March 2006. HEIF is the ISO/IEC 23008-12 image container (MPEG-H Part 12, finalized in 2015) that wraps HEVC-encoded stills — the same compression Nokia's reference work measured as needing 2.39× less bitrate than JPEG for matched picture quality. Extracting a HEIF still from a WMV clip lets you keep a high-fidelity frame at roughly half the storage cost of a JPG export.

• Archive a still from old Windows-era footage — Decade-old WMV recordings from camcorders, Windows Movie Maker exports, or screen captures are awkward to view on modern devices; pulling key frames out as HEIF preserves the moment in a format that iOS 11+, Windows 11 22H2, and Android 10+ open natively.
• Build thumbnails for a content library — Use Multiple Screenshots to dump 5-10 evenly spaced frames per clip, then pick the cleanest one for a poster image. HEIF's smaller payload keeps a 10 000-clip thumbnail index manageable.
• Make Photos-app-compatible stills on a Mac or iPhone — HEIF (.heif) and HEIC (.heic) both live in the same container; iOS Photos and macOS Preview render either without extra software, unlike WMV which has had no official Apple decoder since Telestream's Flip4Mac was discontinued in 2020.
• Slide-deck or report imagery — Pull one frame from a training video or product demo, embed the HEIF in Keynote or PowerPoint (Office 365 reads HEIF on Windows 11), and ship a deck that's noticeably smaller than the equivalent JPG-stuffed version.
• Computer-vision and ML pipelines — HEIF can also carry alpha channels, depth maps, and burst sequences alongside the main image; if you only need one well-compressed reference frame from a long WMV capture, HEIF is the modern choice over JPEG.

HEIF vs HEIC vs JPG — What You're Actually Getting

xconvert writes a HEIF file with the HEVC profile by default, so the bytes are equivalent to a .heic — the difference is purely the extension and MIME label (image/heif vs image/heic). Rename if your target app is fussy about extension, or use WMV to HEIC if you want the .heic extension from the start.

Quality Preset Quick Guide

Pair the preset with Resolution Percentage when the WMV is 1080p or larger — a 4K WMV downscaled to 50% plus Medium quality is often 5-10× smaller than the source frame at original size, with no visible loss at typical viewing distances.

Frequently Asked Questions

Is HEIF the same thing as HEIC?

Not quite. HEIF is the container defined by ISO/IEC 23008-12; HEIC is the brand for HEIF files whose images are HEVC-encoded. xconvert outputs HEVC-encoded stills, so a .heif from this page and a .heic from WMV to HEIC are byte-compatible — only the extension and MIME differ. Most apps that read one read the other.

Why convert a video file to a single image?

WMV is a motion format; HEIF is a still-image format. The only meaningful conversion is to extract a frame from the video and save it as an image. Use the Specific Frame option with a Time (seconds) value to grab one still, or Multiple Screenshots to dump several across the clip. If you actually need a moving output, see WMV to MP4 instead.

What's the file-size advantage over JPG, in practice?

Nokia's HEIF reference data shows JPEG needs about 2.39× the bitrate to match HEVC still quality, which is why HEIC/HEIF files end up roughly half the size of equivalent JPGs in real shooting. On a frame extracted from a 1080p WMV at Very High quality, expect 200-500 KB for HEIF versus 500 KB-1.2 MB for the same frame as a JPG at quality 90.

Can I view the HEIF file after downloading?

On macOS 10.13+, iOS 11+, iPadOS, Windows 11 22H2 (built-in), and Android 10+ the file opens directly. On Windows 10 install the free Microsoft HEIF Image Extensions from the Microsoft Store. In a browser, only Safari 17+ renders HEIF natively (about 15% of global users per caniuse); for Chrome, Firefox, or Edge previews, convert to JPG or PNG with WMV to JPG or WMV to PNG.

How do I pick the right frame from a long WMV?

Two strategies. (1) Open the WMV in any player first (VLC, Windows Media Player), note the timestamp of the frame you want, then come back here, set Specific Frame, and enter that time in seconds. (2) Use Multiple Screenshots to extract a contact sheet of frames across the clip, then keep the one you like best. Multiple Screenshots is also the right choice when you don't know exactly where the moment lives.

Will the HEIF preserve color and detail from the WMV?

Most WMV files use 4:2:0 chroma subsampling at 8-bit depth, and the HEIF/HEVC still output mirrors that — there is no color or detail gain from converting (you cannot add information that's not in the source). What HEIF gives you is the same visual fidelity in roughly half the storage versus exporting that frame as JPG. If the WMV is from an old camcorder or screen recording, output quality is bounded by the source.

Does this work for .asf files too?

.asf is the same Advanced Systems Format container that .wmv uses; if your file is recognizably ASF with a WMV codec inside, rename the extension to .wmv before uploading. For container conversions and non-WMV ASF streams, the broader Video to HEIF endpoint accepts a wider set of inputs (MP4, MOV, MKV, AVI, FLV).

Are my files uploaded to a server?

Frames are decoded and re-encoded in the browser session and held only as long as needed to produce the download — there is no account, no permanent storage, and no watermarking. Close the tab and the working copies are released. This matters for footage you don't want to leave on a third-party server (interview clips, internal demos, personal recordings).

What if I need a JPG or PNG instead?

HEIF is the right pick when target devices are modern Apple/Microsoft/Android stacks and you care about file size. For maximum compatibility (older Windows, every browser, email, CMS uploads), use WMV to JPG for photographic frames or WMV to PNG for screenshots and frames with sharp text or UI elements.