Upscale images locally on your computer with Upscayl Desktop.
This free, open-source offline image upscaler processes images on your device after installation. Choose an AI model, select an output location, review the result, and keep your image workflow on your own computer.
Available for Windows, macOS, and Linux.
Try the Online Image UpscalerInternet access is required to download the application and obtain updates. Image processing can then run locally without an active internet connection.
An offline image upscaler is an installed application that increases image dimensions using your computer’s own processing hardware.
Unlike an online image upscaler, it does not need to upload each source image to a remote processing service. You select an image stored on your computer, choose the relevant model and settings, and save the resulting file locally.
Image processing happens on the local machine.
An internet connection is not needed for local processing.
Desktop is available for Windows, macOS, and Linux.
Several AI models are included.
Compatible custom models can be added.
Output resolution and other application settings can be configured.
Local processing is the central benefit of Upscayl Desktop.
Personal photographs.
Client-approved assets.
Unpublished creative work.
Internal business imagery.
Large folders of similar images.
Limited or unreliable internet access.
A preference for local file management.
Local processing does not automatically make every workflow risk-free. You remain responsible for computer security, backups, image rights, application updates, and protecting exported files.
Download Upscayl DesktopYour source image does not need to be uploaded to Upscayl Cloud when you use the Desktop application’s local workflow.
This is particularly useful for personal collections, client projects, internal assets, and images that you prefer to keep within your own storage environment.
Once the application and necessary resources are installed, you can process supported images without relying on a continuous internet connection.
This is helpful while traveling, working in areas with unreliable connectivity, or handling repeated image tasks locally.
Upscayl currently describes its Desktop application as free and open source. Users can also inspect its public development activity through the project’s official GitHub presence. Upscayl Download · Upscayl GitHub
Different images respond differently to AI processing. A natural photograph, digital illustration, product image, and old scan may not benefit from the same model.
Upscayl Desktop currently provides several models and supports compatible custom models.
Batch processing can help when a folder contains similar images that need the same scale and model. Test one representative image before processing the complete folder.
Choose where completed files are saved and keep the source, test, and approved version separate.
Choose the correct release for Windows, macOS, or Linux. Complete the installation and open the application.
Start with the highest-quality original available. An original photograph, export, or scan usually provides a better foundation than a screenshot or repeatedly compressed file.
Do not select a model based only on its name. Test the result on the actual image.
Choose the output size based on where the image will be used. Larger is not automatically better.
If you only need a moderate enlargement for a website or presentation, avoid creating a much larger file without a practical reason.
Save the upscaled result as a new file. Do not overwrite your only original image.
Processing time depends on the source dimensions, selected settings, model, scale, and available computer hardware.
If the result looks unnatural, try a different model, use a smaller scale, or return to a cleaner source file.
Start Offline Image Upscaling
For portraits, landscapes, travel photographs, and lifestyle imagery, prioritize natural texture and believable edges.
Realistic skin and hair.
Controlled sharpness.
Natural foliage.
Clean building edges.
Preserved light and shadow.
Avoid a result that looks excessively smooth, outlined, or artificially textured.
Illustration-oriented processing should protect line work, color blocks, gradients, and intentional shapes.
Consistent outlines.
Smooth gradients.
Clean flat-color areas.
Preserved character features.
Stable patterns and backgrounds.
Product imagery needs accuracy more than dramatic enhancement.
Product proportions.
Logos and printed labels.
Seams and material texture.
Packaging edges.
Reflections and shadows.
Color consistency.
Do not publish an upscaled result if AI processing changes a product feature or label.
Begin with the highest-quality scan you can create. Upscaling may make a scan larger and more useful for review, but it cannot reliably reconstruct historically accurate details that are missing.
Keep the original scan and record which model and settings were used.
| Factor | Upscayl Desktop | Upscayl Cloud |
|---|---|---|
| Processing location | Your computer | Cloud infrastructure |
| Internet needed during processing | Not normally required after setup | Required |
| Installation | Required | Browser-based |
| Local hardware | Important | Cloud handles processing |
| Windows, macOS and Linux | Desktop downloads available | Runs through a supported browser |
| Phone and tablet access | Not the primary Desktop workflow | Cloud page lists mobile and tablet access |
| AI models | Multiple Desktop models and compatible custom models | Cloud lists additional and commercial models |
| Image editing and generation | Focused on local upscaling | Cloud also lists AI generation and editing |
| Files | Managed locally | Uploaded and generated files follow the Cloud policy |
| Pricing | Desktop is described as free and open source | Check current Cloud plans and credits |
Choose Desktop when offline processing, local file control, and repeated upscaling are most important.
Choose Cloud when browser access, Cloud processing, additional Cloud tools, or limited local hardware makes more sense. Compare Upscayl Desktop and Cloud
A standard 4K UHD screen has a resolution of 3,840 × 2,160 pixels.
Its aspect ratio.
Whether it will fill the screen.
How it will be cropped.
The source resolution.
The intended viewing distance.
The visual quality of the upscaled result.
For example, a square image does not need to be distorted into a 16:9 frame. It can be enlarged proportionally and placed within the 4K layout.
An image with 4K pixel dimensions is not automatically a genuinely detailed image. AI upscaling creates additional pixels, but it cannot guarantee accurate recovery of details absent from the source.
Determine the required display area.
Calculate a proportional output size.
Choose the smallest scale that meets the requirement.
Review the result on the intended screen.
Crop or resize only after confirming the composition.
Upscale an Image for 4KCreate larger review copies, prepare client proofs, and process approved images locally. Keep source photographs and exported versions separate.
Upscale client-approved assets without adding an upload step to the workflow. Record the selected model and scale for consistent production.
Process product images locally and inspect every label, edge, reflection, and product feature before publishing.
Create larger versions of digital artwork while checking lines, gradients, intentional texture, and character details.
Work with personal photo scans locally. Preserve the unedited scan and avoid treating AI-created details as historical evidence.
Prepare larger images for slides, classroom materials, displays, and internal documents without depending on browser processing.
Download and install the application when connected, then run suitable image-upscaling jobs locally.
Batch processing is helpful when several images share a similar source type and final requirement.
Select one representative image.
Test the intended model and scale.
Check the result at final viewing size.
Confirm the output filename and folder.
Process the complete batch.
Review a sample from the beginning, middle, and end.
Inspect important images individually.
Do not apply one model blindly to a mixed folder containing portraits, illustrations, screenshots, and product photographs.
Explore Batch Image UpscalingCreate a larger version of a suitable image.
Make a small image more practical for a screen or layout.
Process images without uploading each one to a Cloud service.
Compare different AI models.
Prepare a working version for further design or editing.
Process similar images through a local batch workflow.
Accurate recovery of missing facial details.
Perfect correction of severe motion blur.
Correct reconstruction of tiny text or logos.
Removal of every compression artifact.
Print-ready quality from every source.
Factual reconstruction of damaged or missing areas.
A better result simply because the output file is larger.
Honest examples should include weak results as well as strong ones.
To add original value, include controlled tests completed with the current Upscayl Desktop release.
Application version.
Operating system.
CPU and graphics hardware.
Source dimensions and format.
Selected model.
Selected scale.
Processing time.
Output dimensions and format.
Whether another edit was applied.
Visible strengths.
Visible limitations.
Test date.
Do not describe a model as “best” unless the claim is supported by a repeatable testing method and representative evidence.
Upscayl Desktop performs its upscaling work locally, according to the current official Desktop page. Images processed through that local workflow do not need to be submitted to Upscayl Cloud. Upscayl Desktop
Local processing and Cloud processing should not be described as identical.
If you choose the online image upscaler, review the current Cloud Privacy Policy before uploading personal, client, or sensitive images. The policy describes the collection of uploaded content, output retention, service providers, deletion rights, and its statement that uploaded images are not used for AI-model training. Upscayl Privacy Policy
Keep your original file.
Maintain a separate backup.
Download software only from verified sources.
Protect your computer and local storage.
Obtain permission to process images when required.
Do not use enhancement to misrepresent a person, product, or event.
Avoid screenshots when the original image or export is available.
One controlled test can prevent an entire folder of unsuitable outputs.
Base the scale on the final placement rather than the largest option available.
A model that works for an illustration may be unsuitable for a natural photograph.
Processing an already upscaled image again can amplify artifacts and introduce unnatural detail.
A result that looks impressive at extreme zoom may not be better at normal viewing size—or the reverse.
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Free and open-source Desktop software.
Windows, macOS, and Linux availability.
Local image processing.
Multiple AI models.
Compatible custom-model support.
Batch upscaling.
Configurable output options.
An online Cloud alternative when local hardware is not suitable.
The best product path depends on how you work. Desktop is the appropriate route for offline processing; Cloud is the appropriate route for browser-based processing and Cloud-only tools.
Yes. Upscayl’s official Desktop page states that processing happens locally and does not require an internet connection. Internet is still needed to download the application and obtain updates. Upscayl Desktop
Upscayl Desktop is currently described as free and open source. Distribution channels can differ, particularly application-store versions, so verify the current option before downloading.
No. Upscayl Cloud is the online, browser-based product. Upscayl Desktop is the offline-processing option.
The official Desktop page states that Desktop processing happens locally. Cloud features are separate and require online data processing.
Local AI processing depends on compatible hardware and the current application requirements. Review the latest compatibility guidance before installing. If your computer is unsuitable, Upscayl Cloud is the alternative because Cloud handles processing remotely.
After downloading, installing, and preparing the application, local Desktop upscaling can run without an active internet connection. Some update, download, or external-link functions may still require connectivity.
You can create a larger image intended for a 4K layout when the selected scale and source dimensions support the required output. Always maintain the original aspect ratio and review the result.
Neither is universally better. Offline processing provides local file control and does not rely on upload speed. Online processing avoids relying on compatible local hardware and can provide Cloud-only features.
No. Results depend on the source, model, scale, and intended use. Severe blur, tiny text, missing features, and heavy compression may not improve reliably.
Upscayl Desktop supports batch upscaling. Test a representative image before processing the complete folder.
The current Desktop page says compatible custom models can be added. Follow current official guidance because model compatibility and conversion requirements matter.
Use a separate output filename and folder so the original remains unchanged. Confirm the output settings before starting a batch.
Keep processing on your computer with Upscayl Desktop, or use Upscayl Cloud when you need a browser-based alternative.
Download Offline Image Upscaler Download for Windows, Mac or Linux Try the Online Image Upscaler