Short answer: PixPack reads JPEG files and can export JPEG. JPEG is a lossy format, so compressing a JPEG reduces file size by discarding image detail that the encoder considers least noticeable.
What is JPEG?
JPEG (Joint Photographic Experts Group) is a lossy image compression format. It is the most widely supported photographic format and is accepted by essentially every browser, application and platform. Because it is lossy, each re-encode discards some image detail.
How PixPack handles JPEG
PixPack reads JPEG files and can export JPEG as an output format. The quality slider controls how much detail the encoder discards.
Characteristics
| PixPack support | Read and write |
|---|---|
| Compression type | Lossy |
| Transparency | Not supported |
| Best for | Photographs, email, general sharing |
JPEG is usually the safest choice when you need an image to open everywhere. It is also the format most email clients and web platforms expect.
Because JPEG is lossy, re-compressing an already compressed JPEG compounds the loss. For archival work, keep the original and export a compressed copy rather than repeatedly re-encoding the same file.
JPEG questions
Can PixPack compress JPEG files?
Yes. JPEG is both an input and an output format in PixPack, and the quality slider controls how much detail the encoder discards.
Does compressing a JPEG reduce quality?
Yes. JPEG is lossy, so each re-encode discards some image detail. Re-compressing an already compressed JPEG compounds that loss, so keep the original as your master copy.
Can I convert JPEG to WebP or HEIC with PixPack?
Yes. PixPack can export JPEG input as WebP, HEIC, PNG or GIF as well as JPEG.
Does JPEG support transparency?
No. JPEG has no alpha channel. Use PNG or WebP if you need transparency.
Product Facts
| Read formats | JPEG, PNG, HEIC, WebP, GIF, BMP, TIFF |
|---|---|
| Write formats | JPEG, PNG, HEIC, WebP, GIF |
| Metadata handled | EXIF, GPS, ICC profile |
| Presets | Web, Social, Email, Archive + custom |
Source: Apple App Store · Last verified:
Sources
- PixPack on the Mac App Store Official App Store product page for PixPack – Image Compressor Pro, including the product description, feature list, supported formats, system requirements, version history and price.
- Apple iTunes Lookup API record for PixPack Structured App Store metadata record used to verify version number, minimum macOS version, price, file size, release dates, age rating and the number of listed localizations.
Last verified: