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For most general photo editing, retouching, compositing, and graphics work, start with GIMP. Choose Krita if painting or illustration is your main task. If you work primarily with camera RAW files, evaluate darktable or RawTherapee instead of assuming a general layer editor will fit. These are workflow alternatives, not exact Pixelmator Pro replicas.
Pick an alternative by the work you need to do
Apple describes Pixelmator Pro as a tool for professional photo editing, graphic design, digital painting, and illustration. Its documented features include layers, color adjustments, retouching, masks, compositing, background removal, brushes, vector shapes, typography, and export. Apple also says its Mac version supports common image formats, HDR, and 750 RAW formats, including Apple ProRAW; that is Apple’s product specification, not an independent compatibility test. See Apple’s Pixelmator Pro page.
Because the app covers several kinds of work, no single alternative should be assumed to match every part of it. Decide first whether your priority is layered image manipulation, digital painting, RAW development, or quick editing in a browser. Then check your operating system, document-exchange needs, and whether open-source licensing is essential.
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- General image manipulation and compositing: GIMP is the broadest open-source starting point in this shortlist.
- Painting and illustration: Krita is the more focused fit.
- Camera RAW development: Compare darktable and RawTherapee with your camera and workflow.
- Browser access: Photopea is an online editor, but the sources reviewed here do not establish that it is open source.
Best open-source alternatives by workflow
GIMP: the broadest choice for editing and graphics
GIMP is the best first option for readers who want a free, open-source desktop editor for photo manipulation, retouching, restoration, original artwork, or graphics. Its official site lists GNU/Linux, macOS, and Windows among supported platforms and describes plugin-based extension and scripted image manipulation. The site listed GIMP 3.2.6, released September 10, 2026, when checked; verify the current release on the official GIMP site.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
GIMP is the closest broad fit here when you need a general-purpose editor, but the available information does not establish that it reproduces every Pixelmator Pro feature or preserves every file interchange detail. Test representative documents and exports if you need to move editable projects between apps.
Krita: strongest for digital painting and illustration
Krita is a free, open-source painting program aimed at artists. Its project site highlights brush types, layers, drawing assistants, stabilizers, and animation tools. It is a sensible choice when creating illustrations or painting is central; do not treat it as interchangeable with a photography-first RAW workflow. The Krita homepage announced versions 5.3.4 and 6.0.4 on September 15, 2026. Check current downloads and platform information at the Krita project site.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
darktable and RawTherapee: evaluate them for RAW photography
darktable and RawTherapee are photography-oriented options to investigate when your main job is developing camera RAW images. They belong in a different comparison from general layer editors: establish whether your camera is supported and whether the workflow suits you before committing. The available source details do not establish specific camera compatibility, current versions, or particular processing features, so consult the projects’ current documentation for your equipment: darktable and RawTherapee.
Pixelitor: a candidate to check before adopting
A LinuxLinks comparison published September 7, 2026, describes Pixelitor as a layered editor and lists masks, text layers, filters, adjustments, adjustment layers, smart objects, and smart filters. That is a dated secondary-source feature description; current maintenance, releases, and platform support have not been established here. Check the comparison source and confirm project status and availability before relying on Pixelitor for a long-term workflow.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Free browser option: Photopea
Photopea identifies itself as an online photo editor, so it may suit someone who wants to edit in a browser rather than install a desktop application. The evidence available here does not establish an open-source license. Treat it as a free/browser alternative to investigate, not as part of the verified open-source shortlist. Visit the Photopea website for its current terms and capabilities.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Check compatibility before switching
Pixelmator Pro’s requirements are specific to Apple’s product, not to its alternatives. Apple Support says the Mac version requires macOS 12 Monterey or later and is optimized for Apple silicon. Apple distinguishes Pixelmator Pro—used to create designs from images, shapes, and text—from Photomator, which it positions for fast photo editing and batch workflows. Apple’s current product presentation also includes Mac and iPad versions and associates Warp Tool access with the Apple Creator Studio version; availability and packaging can vary by date and location. Consult Apple Support’s Pixelmator Pro information and Apple’s current product page for current details.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Before moving a real project, use a small set of representative files to check the parts that matter to you:
- Confirm the editor runs on your operating system and device.
- Open the image formats and RAW files you actually use; for RAW work, verify camera support in the project’s current documentation.
- Check whether layers, masks, text, and other editable elements remain usable in the formats you exchange.
- Export a sample and inspect its appearance in the destination app or service.
- If open-source licensing is a requirement, confirm the project’s current license rather than inferring it from a price or download page.
No controlled performance test or complete file-format-fidelity comparison is available for these apps, so a compatibility trial with your own files is more dependable than assuming a one-for-one replacement.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
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