Shrink images & PDFs — right on your Mac.
Batch-compress, convert, and optimize, without uploading a single file.
Drop in files or whole folders, pick a preset, and ImgOpt does the rest — with best-in-class engines and results that are never larger than the original.
MozJPEG, ZopfliPNG, libwebp, and ImageIO under the hood. Real engines, not a generic re-save.
JPEG, PNG, HEIC, WebP, AVIF — or keep the original format and just optimize it in place.
Compress PDFs, export pages as images, and combine images into a single PDF — passwords included.
Everything runs on your Mac. No uploads, no accounts, no tracking, no network access at all.
Hundreds of files at once, with adaptive concurrency that scales to your Mac and backs off under memory pressure.
Finder right-click menu, Shortcuts & the Services menu. Optimize without even opening the app.
Drop in ten formats; convert to a modern one, or keep the original container and just optimize it.
Drop files or folders in any of these:
Convert to a modern format, or keep the original and just optimize it:
"Keep Original" preserves the source container — a dropped GIF stays an (animated) GIF, a TIFF stays a TIFF — and SVGs can stay as optimized vectors.
Each format is handled by the tool the pros use, with lossless options that keep your pixels bit-for-bit identical.
| Format | Engine | Mode |
|---|---|---|
| JPEG | MozJPEG — trellis quantization, optimized Huffman, progressive scans | Lossy |
| JPEG (re-pack) | Lossless Huffman re-encode — bit-identical pixels, smaller file | Lossless |
| PNG | ZopfliPNG extra-effort DEFLATE, or fast ImageIO; optional palette quantization with dithering | Lossless Lossy |
| WebP | libwebp — lossless by default, or high-quality lossy | Both |
| HEIC | Apple ImageIO / HEVC encoder | Lossy |
| AVIF | Apple's native AV1 encoder | Lossy |
| SVG | Text-level cleanup — strips comments & editor metadata, shortens colors; keeps titles, scripts, CSS & animation | Lossless |
| qpdf lossless rewrite, or lossy via rasterize / embedded-image re-compression | Lossless Lossy |
Never-inflate guarantee: ImgOpt compares every result against the source and ships whichever is smaller — your files are never made bigger.
Fine-grained resize, metadata, naming and performance controls — or just pick a preset and go.
{name}, {date}, {width} and zero-padded
# sequences, with an optional web-safe mode.Compress, export and combine — with password-protected PDFs handled gracefully.
Lossless qpdf rewrite, or lossy modes that re-compress embedded images or rasterize pages — with Smaller / Balanced / Better quality presets.
Turn any page range into JPEG, PNG, HEIC, WebP or AVIF at 72–600 DPI, with optional resize and watermark per page.
Merge a stack of images into one optimized PDF, in your chosen order, with resize and watermark applied.
Password-protected PDFs are handled gracefully: unlock with a prompt, then keep the original encryption on the output or remove it — your choice.
Drop in your logo and ImgOpt composites it onto every image as it's optimized — no round-trip through another app.
Finder, Shortcuts, the Services menu and a URL scheme — ImgOpt meets you where you already work.
Right-click any image or folder for "Open in ImgOpt…", a quick Convert-to submenu, and your own presets — straight from Finder.
Build automations that optimize images with a named preset, or list your presets. Runs headless in the app's sandbox.
"Optimize Image with ImgOpt" in the system Services menu, plus an imgopt:// URL scheme
for power users.
Preview files in the list, drag to reorder for sequence naming, and open an info panel with full source details.
No uploads, no accounts, no tracking — sandboxed and hardened, by design.
All processing happens in-process, on-device. ImgOpt has no network access entitlement — it literally can't phone home.
No analytics, no data collection, no sign-in. The privacy manifest declares exactly nothing collected.
Runs in the App Sandbox with the hardened runtime, only touching files you explicitly choose.
No subscription. Buy Premium once and it's yours on every Mac signed in to the same Apple ID — including every Premium feature added in future updates.
The questions we get asked most.
No. Everything runs entirely on your Mac. ImgOpt doesn't have network access at all — your files never leave the device, and there are no accounts or analytics.
No. Premium is a single one-time purchase (a non-consumable In-App Purchase). It unlocks on every Mac signed in to the same Apple ID, supports Family Sharing, and includes every Premium feature added in future updates.
Never bigger — ImgOpt compares each result against the source and keeps whichever is smaller. For quality, you choose: lossless modes keep your pixels bit-for-bit identical, while lossy modes give you a quality slider for maximum savings.
JPEG, PNG, HEIC, HEIF, TIFF, WebP, GIF, BMP, SVG and PDF — individual files or whole folders. You can convert to JPEG, PNG, HEIC, WebP or AVIF, or keep the original format and just optimize it.
A Mac running macOS 14 or later, on Apple Silicon or Intel. ImgOpt is available in English and Traditional Chinese.
Free to download. One-time unlock when you want the pro tools.