Batch up to 2,000 files in one go
Drop a whole folder — a camera roll of photos or a season of videos. Zumkor converts every file at once and drops the results into the folder you choose — it remembers your pick, and your originals stay put.
100% on your Mac · No subscription
Convert any photo, audio, or video into the format you need.
Zumkor is a Mac app that turns HEIC into JPG, MKV into MP4, RAW into TIFF, and video into MP3 or GIF — a whole folder at a time. Everything runs on your Mac. Nothing is uploaded. Buy once, keep it forever.
One-time $19.99 — no subscription
100% offline, nothing uploaded
Free for 7 days — no account, no sign-up
Converts in every direction — a handful of the hundreds of combinations:
- HEIC → JPG
- JPG → HEIC
- MKV → MP4
- WebM → MP4
- AVI → MP4
- MOV → MP4
- MTS → MP4
- VOB → MP4
- PNG → JPG
- RAW → TIFF
- FLAC → MP3
- M4A → MP3
- WAV → MP3
- WMA → MP3
- MP4 → GIF
- MP4 → MP3
What Zumkor does
Drag a file in. Pick a format. Done.
Built for the everyday moment when a file is the wrong type, the wrong size, or won't open — and you just need it fixed, without uploading it to a stranger's server.
100% on your Mac, fully offline
Your files are never uploaded — nothing ever leaves your Mac. Convert on a plane with Wi-Fi off and it works exactly the same. Private by default.
Subtitles, written for you
Need captions? Zumkor listens to your video and writes the subtitles for you — right on your Mac, on macOS 26 and up (the first time, your Mac downloads Apple’s speech files).
Shrink files to fit anywhere
Too big for Gmail, WhatsApp, Discord, or Notion? Pick where it’s going and Zumkor shrinks the video to fit — or tells you if it can’t. Photos resize for email or the web. No bitrate math, no codec menus to learn.
Trim to just the good part
Only need a piece of a video? Trim it before you convert — no separate editor needed.
Strip personal data in one click
Remove GPS location and device info from photos before you send them. It is one click, and it is always your choice — never automatic, never silent.
Whatever you're trying to do
The conversions people actually need.
No codec knowledge required. If you can say what you want the file to become, Zumkor can do it — usually in a single batch.
HEIC to JPG
Got iPhone photos someone needs as JPGs? Turn hundreds of HEIC files into JPG in a single batch.
Any video to MP4
A video that won’t play — MKV, WebM, AVI, old camcorder .MTS or DVD .VOB files? Make it an MP4 that plays anywhere.
Pull audio out of video
Just need the sound? Extract the audio from any video, or convert it to a plain, normal MP3.
Screen recording to GIF
Recorded your screen? Turn it into a GIF for Slack, Linear, or GitHub — sized to actually upload.
RAW to JPG or TIFF
Photographer? Convert Canon, Nikon, and Sony RAW files to JPG or TIFF in one batch.
Subtitles: SRT to VTT
Convert SRT to VTT, or pull the subtitles straight out of a video file.
Found the conversion you need? Free for 7 days, then 5 files a day free — or one-time $19.99 for everything. Batch your first folder in the next minute.
Download on the Mac App Store Zumkor — free downloadGuides
Step-by-step guides for your files.
Walkthroughs for the conversions people bring to Zumkor: the free built-in route on your Mac, and the one-batch route.
- Photos & RAW images
How to convert HEIC to JPG on Mac (batch, offline, 2026)
Convert HEIC photos to JPG on your Mac — one file or a whole folder — with Preview, sips, Finder Quick Actions, or Zumkor. Fully offline, no upload.
- Video formats
How to convert MOV to MP4 on Mac (lossless, batch, 2026)
Convert MOV videos to MP4 on your Mac with iMovie, ffmpeg, or Zumkor. Includes the lossless stream-copy trick that remuxes in seconds with zero quality loss.
- Audio formats
How to convert MP4 to MP3 on Mac (extract audio, offline)
Convert MP4 to MP3 on your Mac — or stream-copy the audio losslessly to M4A. QuickTime, ffmpeg, and Zumkor routes compared, batch-friendly and fully offline.
- Shrink video to send
How to Compress a Video for Email on Mac (Gmail, Outlook)
Video too big to email? Shrink it on your Mac to fit Gmail's 25 MB or Outlook's 20 MB limit with QuickTime, ffmpeg, or Zumkor, which sizes it for you. Offline, no upload.
- GIFs & subtitles
How to convert MP4 to GIF on Mac (Discord-ready, offline)
Turn an MP4 into an animated GIF on your Mac with ffmpeg or Zumkor — trim to the moment, land under Discord's 256 KB autoplay cap or Notion's 5 MB, fully offline.
- Video formats
How to convert MKV to MP4 on Mac without losing quality
Convert MKV to MP4 on your Mac without re-encoding — remux with ffmpeg for zero quality loss, or drag-and-drop with Zumkor. Offline, batch, no upload.
- Photos & RAW images
How to convert RAW to JPG on Mac (CR2, CR3, NEF, ARW — batch)
Convert camera RAW files — CR2, CR3, NEF, ARW, RAF, DNG — to JPG on your Mac with Preview, sips, or Zumkor. Batch whole shoots offline, nothing uploaded.
- Photo privacy
How to remove EXIF data from photos on Mac (GPS, batch, 2026)
Photos carry GPS coordinates, timestamps, and device info. Remove EXIF data from photos on Mac with Preview, exiftool, or Zumkor's one-click batch strip — all offline.
Formats it handles
Convert between them — in both directions.
Open the long list on the left; save to any format on the right. Within each group, what Zumkor opens converts to what it writes — except that camera RAW saves to JPG or TIFF and camcorder and DVD footage becomes MP4 — and formats on both sides (JPG, PNG, MP4, MP3, MKV…) go either way, so it's HEIC → JPG and JPG → HEIC.
Images
Opens
HEIC, JPG, PNG, TIFF, WebP, AVIF, GIF, BMP, camera RAW (Canon, Sony, Nikon, Fuji, and more)
Saves to
- JPG
- PNG
- HEIC
- TIFF
- WebP
- AVIF
Audio
Opens
MP3, M4A (AAC), WAV, AIFF, FLAC, OGG, Opus, WMA
Saves to
- MP3
- M4A (AAC)
- ALAC
- WAV
- AIFF
- FLAC
- Opus
Video
Opens
MP4, MOV, M4V, MKV, WebM, AVI, WMV, FLV, 3GP, AV1 — plus AVCHD camcorder (.MTS, .M2TS), .TS, and DVD (.VOB) files, which convert to MP4
Saves to
- MP4
- MOV
- M4V
- MKV
GIF & subtitles
Opens
Any video’s embedded text-subtitle track, SRT, VTT
Saves to
- Animated GIF
- Extracted MP3
- SRT
- VTT
Mac-native
Native to your Mac. Nothing in the cloud.
Zumkor is a real Mac app, built for Apple silicon — not a web page in a wrapper. Every conversion happens locally, so your photos, recordings, and RAW files never touch a server. Bring pictures in straight from your Photos library, and automate conversions with Shortcuts — without even opening the app.
- macOS 14.0+ Sonoma or later
- Apple silicon M1 chip or later
- Fully offline Nothing uploaded
- No account Just download & go
Pricing
One price. Yours forever.
Use everything free for 7 days. After that, keep converting 5 files a day (25 a week) for free — free videos get a small Zumkor mark — or unlock everything with a single purchase your whole family can share. No subscription, no renewals, no per-file limits.
$19.99 once
Buy once, keep it forever. No subscription.
- Convert unlimited photos, audio, and video
- Batch up to 2,000 files in one pass
- Every format above — in and out
- Compress to hit email and chat size limits
- Trim video + AI subtitles (macOS 26+)
- Strip GPS + device metadata from photos
- Automate with Shortcuts
- 100% offline — one purchase, no subscription
- Shared with your family via Family Sharing
Stop hunting for a converter that just works.
One Mac app for every photo, audio, and video format — offline, in bulk, and yours for a single price. Download Zumkor free, use everything for 7 days, and convert your first folder in the next minute.