Side by side
| Tool | Free limit | Max free output | Watermark | Sign-up | Uploads your image | Paid price |
|---|---|---|---|---|---|---|
| Upscale4 | 5 images a day, batches of 5Source: our pricing | 2× and 4×, up to 4,096 px on the long sideSource: our pricing | No watermarkSource: our pricing | First download each day needs no account, then a free accountSource: our pricing | No, it runs in your browserSource: our pricing | Pro $5/month or $50/year: no size cap (up to 16,384 px), unlimited, batches of 200Source: our pricing |
| Pixelcut | 3 downloads a daySource: pixelcut.ai, checked 6 Oct 2026 | Output up to "16K"Source: pixelcut.ai, checked 6 Oct 2026 | No watermarkSource: pixelcut.ai, checked 6 Oct 2026 | Not requiredSource: pixelcut.ai, checked 6 Oct 2026 | Yes, to their serversSource: pixelcut.ai, checked 6 Oct 2026 | $10/month, or $8/month billed yearlySource: pixelcut.ai, checked 6 Oct 2026 |
| iLoveIMG | 1 upscale a monthSource: iloveimg.com, checked 6 Oct 2026 | Not publishedSource: iloveimg.com, checked 6 Oct 2026 | Not publishedSource: iloveimg.com, checked 6 Oct 2026 | Not publishedSource: iloveimg.com, checked 6 Oct 2026 | Yes, to their serversSource: iloveimg.com, checked 6 Oct 2026 | Premium $7/month or $48/year, still 3 upscales a monthSource: iloveimg.com, checked 6 Oct 2026 |
| Upscale.media | 1 image a day without an account, 3 a month with oneSource: upscale.media, checked 6 Oct 2026 | Not publishedSource: upscale.media, checked 6 Oct 2026 | Not publishedSource: upscale.media, checked 6 Oct 2026 | Optional for 1 a day, account for 3 a monthSource: upscale.media, checked 6 Oct 2026 | Yes, to their serversSource: upscale.media, checked 6 Oct 2026 | Credit-based plansSource: upscale.media, checked 6 Oct 2026 |
| Bigjpg | 20 images a month, slow queue on freeSource: bigjpg.com, checked 6 Oct 2026 | Up to 4×Source: bigjpg.com, checked 6 Oct 2026 | No watermarkSource: bigjpg.com, checked 6 Oct 2026 | Not requiredSource: bigjpg.com, checked 6 Oct 2026 | Yes, deleted after 24 hoursSource: bigjpg.com, checked 6 Oct 2026 | $6 for 2 months or $22 for 12 months, up to 16×Source: bigjpg.com, checked 6 Oct 2026 |
| Let's Enhance | 10 credits, once, at sign-upSource: letsenhance.io, checked 6 Oct 2026 | Output up to 8 MPSource: letsenhance.io, checked 6 Oct 2026 | Watermark on free resultsSource: letsenhance.io, checked 6 Oct 2026 | Account requiredSource: letsenhance.io, checked 6 Oct 2026 | Yes, to their serversSource: letsenhance.io, checked 6 Oct 2026 | From $9/month billed yearly, 100 creditsSource: letsenhance.io, checked 6 Oct 2026 |
| ImgUpscaler | 50 images a monthSource: imgupscaler.com, checked 6 Oct 2026 | Up to 4×Source: imgupscaler.com, checked 6 Oct 2026 | No watermark, but shows adsSource: imgupscaler.com, checked 6 Oct 2026 | Not publishedSource: imgupscaler.com, checked 6 Oct 2026 | Yes, deleted after 24 hoursSource: imgupscaler.com, checked 6 Oct 2026 | $9.90/month, unlimited plan $19.90Source: imgupscaler.com, checked 6 Oct 2026 |
| Upscayl | Unlimited, free and open sourceSource: upscayl.org, checked 6 Oct 2026 | Up to 16×Source: upscayl.org, checked 6 Oct 2026 | Not publishedSource: upscayl.org, checked 6 Oct 2026 | Desktop install, needs a Vulkan-capable GPUSource: github.com, checked 6 Oct 2026 | No, runs on your computerSource: upscayl.org, checked 6 Oct 2026 | Free (open source)Source: github.com, checked 6 Oct 2026 |
"Not published" means we could not confirm that detail on the linked page when we checked on 6 Oct 2026. Prices and limits change, so check the source before you decide.
Which one to use
- Your image must not leave your device, and you want it in the browser: Upscale4.
- You can install a desktop app and have a Vulkan-capable GPU: Upscayl, free and unlimited.
- You want the largest free result from a website and the upload is fine: Pixelcut.
- You need many free images in one day and the upload is fine: ImgUpscaler (50 a month).
- You want specialist face, text or anime models and will pay: Let's Enhance.
- You want the cheapest yearly plan or more than 4×: Bigjpg.
Detailed comparisons
- Upscale4 vs PixelcutLargest free output of the web tools here, but your image is uploaded.
- Upscale4 vs iLoveIMG1 free upscale a month and a 6 MB file limit; Premium still caps upscales at 3 a month.
- Upscale4 vs Upscale.mediaFace enhancement and credit plans, 1 free image a day without an account.
- Upscale4 vs BigjpgCheapest yearly plan and up to 16× on paid, but 5 MB input and a slow free queue.
- Upscale4 vs Let's EnhanceSpecialist face, text and anime models, but free results carry a watermark.
- Upscale4 vs ImgUpscaler50 free images a month with ads; images upload and are deleted after 24 hours.
- Upscale4 vs UpscaylExcellent free desktop app if you can install it and have a Vulkan GPU.
Questions
Which free AI image upscaler does not upload my image?
Upscale4 runs in your browser and Upscayl runs as a desktop app, so neither uploads your image. The other tools in this table process images on their servers.
Which free upscaler needs no sign-up?
Pixelcut and Bigjpg list no sign-up. Upscale.media gives 1 image a day without an account. Upscale4 needs no account for the first download each day, then a free account.
Which one gives the biggest free result?
Among the web tools, Pixelcut lists output up to "16K". Upscale4 Free goes up to 4,096 px on the long side, and Pro removes that cap. Upscayl goes up to 16× if you can install it.
How did you check these numbers?
We read each tool's own pricing or product page on 6 Oct 2026 and link it next to every figure. Anything we could not confirm is marked "Not published".