How to convert TIFF to JPG on Mac (batch, offline, 2026)

A TIFF file is never a problem until it has to leave your Mac. The scan looks perfect in Preview — then you try to email it and it’s 80 MB. The retoucher delivered the finished photos as TIFFs and the listing portal only takes JPG. The museum archive, the flatbed scanner, the old Photoshop job folder: all TIFFs, all enormous, all rejected by whatever form, chat, or CMS you’re trying to feed them into. TIFF is a master format — built for fidelity, not for travel — and the rest of the internet runs on JPG.

The fix is one conversion, and your Mac can do it without installing anything. This guide covers how to convert TIFF to JPG on a Mac, entirely on-device — Preview for a file or two, Finder’s hidden batch converter, the sips command line, and the drag-a-folder route — plus the handful of things TIFF can contain (16-bit color, layers, CMYK, multiple pages) that don’t survive the trip, so none of them bites you silently.

In this guide10 sections

Why TIFF files are enormous

TIFF stores image data either uncompressed or with lossless compression — every pixel at full fidelity, nothing thrown away. Scanners often write it at 16 bits per channel instead of JPG’s 8; Photoshop TIFFs can carry layers; document scanners stack multiple pages into a single file. A 12-megapixel photo that weighs 3 MB as a JPG weighs 36 MB as an uncompressed 8-bit TIFF, and a 16-bit scan doubles that.

That weight buys real things: no compression artifacts ever, full editing headroom, and archival durability — which is why print shops, retouchers, archivists, and scanner defaults all reach for TIFF. It’s the right format for keeping an image. It’s the wrong format for sending one.

JPG is the distribution answer: at 80–90% quality it’s visually identical on screen, a tenth of the size or less, and accepted by literally everything — every portal, every CMS, every chat app, every device made this century.

One decision before you convert, though: is this TIFF a master? If it’s the only full-quality copy — an archival scan, a retoucher’s delivery, an edited original — keep the TIFF and treat the JPG as the copy that travels. The JPG encode discards data permanently, and converting the JPG back to TIFF later just makes a huge file of the same compressed pixels. If the TIFF is disposable (a scanner default you never wanted, a one-off export), convert and move on.

Skip the upload-a-file converter sites

The web-converter objection is sharper for TIFF than for most formats, because the files are huge: uploading 80 MB to a free converter site — many of which cap uploads below that — then waiting to download the result is the slowest possible version of a job your Mac finishes locally in seconds. It also puts your scans, client deliveries, or family archive on someone else’s server. Every route below is fully offline — Wi-Fi off, nothing leaves the machine.

Method 1: Preview (best for one or two files)

Preview opens TIFF natively, and exporting is one dialog:

1. Double-click the .tiff (or .tif) file — it opens in Preview.
2. Choose File → Export.
3. Set Format to JPEG.
4. Set the Quality slider — 80–90% is visually identical to the source and far smaller than maximum.
5. Click Save.

Done in ten seconds, free, already installed. Preview also manages a small batch: select several TIFFs in Finder, open them all in Preview at once, press ⌘A in the thumbnail sidebar, then File → Export Selected Images and pick JPEG in the options panel. Workable up to a couple dozen files; beyond that the sidebar dance gets old.

Method 2: Finder’s Quick Action (fastest free batch)

The batch converter most Mac users never find lives in the right-click menu:

1. In Finder, select the TIFF files — ⌘-click a handful, or ⌘A for the folder’s worth.
2. Right-click the selection.
3. Choose Quick Actions → Convert Image.
4. Set Format to JPEG, pick an image size (Actual Size keeps full resolution), and untick “Preserve Metadata” if the scans shouldn’t carry it.
5. Click Convert to JPEG.

Fresh .jpg copies appear next to the originals, originals untouched. For a one-off pile of scans this is the best free answer on the platform. Its limits: no precise quality control, only coarse size presets, and no renaming — you keep whatever filenames the scanner invented.

Method 3: sips in Terminal (scripted batches)

macOS ships sips, a command-line image processor that has spoken TIFF since before Mac OS X had a version number.

One file:

sips -s format jpeg scan.tiff --out scan.jpg

A whole folder:

cd ~/Pictures/scans
for f in *.tif *.tiff; do
  [ -e "$f" ] || continue
  sips -s format jpeg "$f" --out "${f%.*}.jpg"
done

With an explicit quality level (0–100):

sips -s format jpeg -s formatOptions 85 scan.tiff --out scan.jpg

Fast, free, scriptable — ideal when TIFF conversion is one step in a pipeline. Two cautions: it’s unforgiving (no preview, no undo, a mistyped --out clobbers files), and on a multi-page TIFF it converts only the first page — more on that below.

Method 4: Zumkor (drag the folder, done)

If the TIFFs arrive by the folder rather than by the file — a scanning project, a retoucher’s delivery, years of archived masters that need web-sized copies — this is the chore Zumkor exists to delete (it needs macOS 14 or later on an Apple silicon Mac — any M-series machine):

1. Open Zumkor and drag in the TIFFs, or the whole folder — subfolders included if you tick “Look inside subfolders”.
2. Pick JPG as the output format.
3. (Optional) Pick a resize preset — “Email-friendly” (1600 px) or “Web small” (1280 px) if the copies are headed for email, a document, or a listing — and the “Privacy export” preset if the files shouldn’t carry metadata.
4. Click Convert and choose where the output lands.

The parts that matter at archive scale: the queue takes up to 2,000 files, folder structure can be mirrored in the output so Scans/1998/box3.tiff comes out as Scans/1998/box3.jpg, color profiles are preserved, and the JPGs land in a folder you choose — the TIFF masters stay exactly where they were, untouched. Everything runs on-device: no uploads, no file-size caps, works with Wi-Fi off, and conversions keep running with the window closed.

Zumkor is free for 7 days, full-featured; after that it’s a one-time $19.99 purchase — buy once, keep it forever, no subscription. The honest trade-off: for two scans, Preview is free and already open, and the Quick Action handles a one-off folder. Zumkor earns its slot when the archive has hundreds of files, when output needs resizing in the same pass, and when the same Mac also accumulates HEIC photos, camera RAW, and PNGs that portals reject — one app converts all of it. It runs the return trip too: the “Archive (TIFF)” preset turns delivery formats back into archival TIFF masters from the same queue.

What doesn’t survive the trip (and when that matters)

TIFF is a container with room for things JPG simply cannot hold. None of these are tool failures — they’re format physics, and knowing them beats discovering them.

16-bit color becomes 8-bit. Scanners and editors often write 16 bits per channel; JPG holds 8. On screen you will not see the difference — 8-bit is what screens show anyway. Where it matters is editing headroom: heavy exposure or color moves on an 8-bit file band and posterize sooner. Edit the TIFF, then export the JPG — not the other way around.

Layers flatten. A layered Photoshop TIFF converts to a flat image — the visible composite, with every layer merged. The JPG will look exactly like the TIFF did on screen, but the editability is gone. That’s fine for delivery; just never delete the layered original thinking the JPG preserved it.

Transparency flattens. TIFF can carry an alpha channel; JPG can’t. Transparent regions fill in — typically with white. If the transparency needs to survive, convert to PNG instead; every method above offers PNG in the same menu.

CMYK becomes RGB. TIFFs from print workflows are often CMYK. Preview and sips convert them to RGB on export — correct for screens, email, and the web, but if the file is a print proof, the on-press colors are no longer represented the same way. Send print vendors the original TIFF; send everyone else the JPG.

Multi-page TIFFs become one page. Document scanners sometimes stack a whole session into a single .tif. JPG holds exactly one image, so each page needs its own export — and sips silently takes just the first. If what you scanned is a document rather than a photo, the format you actually want is probably PDF, not a stack of JPGs.

Getting the output right

• Quality: 80–90%. Exporting at 100% roughly doubles the file for a difference no one can see. Below ~60%, gradients and flat areas start showing blocky artifacts. 85 is the boring, correct answer.
• Resize while you’re at it. Scanners produce enormous pixel dimensions. If the JPG is bound for email, a document, or a listing, downsizing the long edge to 1600 px cuts the file dramatically with no visible cost on screen — Preview can’t resize in the export dialog, the Quick Action has coarse presets, and Zumkor’s “Email-friendly” preset does it in the conversion pass.
• Strip metadata on anything public. Scans and edited photos can carry more than you think — see removing EXIF data from photos on a Mac. The Quick Action’s checkbox and Zumkor’s “Privacy export” preset both handle it during conversion.
• Never round-trip. TIFF→JPG→edit→JPG stacks lossy compression on lossy compression. Edit the TIFF master, export once, and regenerate from the master whenever you need a different size.

Bottom line

• One or two files: Preview → File → Export → JPEG at 85%. Ten seconds, free.
• A folder, occasionally: select all in Finder → right-click → Quick Actions → Convert Image → JPEG. The best free batch option.
• Part of a script: a sips loop — but remember it takes only the first page of a multi-page TIFF.
• An archive, a delivery, or a recurring chore: Zumkor — drag the folder, pick JPG plus a resize preset, up to 2,000 files convert offline in one pass, masters untouched, one-time $19.99.
• Before any of it: decide whether the TIFF is a master to archive or a scan to dispose of — and whether the destination actually wants JPG, or needs PNG for transparency or PDF for pages.

However you do it, the conversion belongs on your Mac. Uploading eighty megabytes of your own scans to a converter site to shrink them is the one genuinely bad option on the list.

FAQ

Does converting TIFF to JPG lose quality?

Technically yes — JPG is lossy and TIFF usually isn’t — but at 80–90% JPG quality the difference is invisible on screen. What you can genuinely lose is structural: 16-bit color depth drops to 8-bit, layers and transparency flatten, and a CMYK print file converts to RGB. Keep the TIFF as the master and treat the JPG as the copy that travels.

Why are TIFF files so big?

TIFF stores image data uncompressed or losslessly compressed — every pixel at full fidelity, often at 16 bits per channel, sometimes with layers or multiple pages inside. A single scan or edited photo easily reaches 25–150 MB. Nothing is wrong with the file; that’s what an image weighs before lossy compression, which is exactly why TIFF is used for archives and print masters.

How do I batch convert TIFF files to JPG on a Mac?

For a free one-off, select the TIFFs in Finder, right-click, and choose Quick Actions → Convert Image → JPEG. For scripted pipelines, loop sips -s format jpeg in Terminal. For a recurring chore or big archives, drag the whole folder into Zumkor, pick JPG, and convert up to 2,000 files offline in one pass — with resize presets and metadata stripping in the same step.