# Increase Image Resolution Online

> To increase image resolution online, upload the picture to Kenerate's AI upscaler and choose a size: Real-ESRGAN adds resolution in one pass, Image Upscaler outputs 2K, 4K or 8K, and Kenerate Upscale goes up to 128 MP. Unlike changing DPI — which adds no pixels — upscaling adds real pixels and rebuilds detail. 25 free credits, no watermark.

URL: https://kenerateai.com/increase-image-resolution
Publisher: Kenerate AI (https://kenerateai.com)
Last updated: 26 September 2026

## Key facts
- Upload: JPG, PNG or WEBP up to 25 MB
- Max: 8K or 128 MP
- DPI change: Adds no pixels
- Free to start: 25 credits, no watermark

## Steps
1. Upload the low-resolution image — Add a JPG, PNG or WEBP up to 25 MB to the Kenerate upscaler.
2. Choose how much resolution — Real-ESRGAN adds resolution in one pass. For a set size choose Image Upscaler → 2K, 4K or 8K, or Kenerate Upscale → 4 to 128 megapixels.
3. Download the high-resolution version — Compare at 100% and download — the pixel size is shown with the result. No watermark.

## In depth

### PPI vs DPI
Adobe draws the line clearly: PPI is the pixel density of the digital image; DPI is the dots of ink a printer lays down — and 300 PPI is a go-to setting for high-quality print [1]. Changing the number in the file doesn't add pixels; only resampling or upscaling does.

### What labs and platforms ask for
Walgreens lists 540 × 360 px as the minimum for a 4×6 print and 5400 × 3600 px for a 24×36 poster, at 300 DPI [2]; Shutterfly recommends 1600 × 1200 px for 8×10 [3]. Online, Amazon prefers over 1,000 px on the longest side for zoom [4] and YouTube recommends 3840 × 2160 thumbnails [5].

### AI resolution vs Super Resolution
Adobe's Super Resolution (2021) doubles the width and height of a photo — four times the pixels — and writes a new DNG [6]. Online AI upscalers go further (to 8K or 128 MP here) and work on any format, but both are making educated guesses about detail that wasn't captured.

References:
[1] Adobe — Pixels per inch (PPI) explained: https://www.adobe.com/uk/creativecloud/photography/discover/pixels-per-inch-ppi-resolution.html
[2] Walgreens Developer — Image requirements: https://developer.walgreens.com/support/image-requirements
[3] Shutterfly — Uploading photos guide: https://support.shutterfly.com/s/article/uploading-photos-guide
[4] Amazon Seller Forums — product image size guidance: https://sellercentral.amazon.com/seller-forums/discussions/t/4b3c4c39-6f8c-4312-aa0e-99982eb8f5e1
[5] YouTube Help — Add video thumbnails: https://support.google.com/youtube/answer/72431
[6] Adobe — Super Resolution, from the ACR team (2021): https://blog.adobe.com/en/publish/2021/03/10/from-the-acr-team-super-resolution

## FAQ
Q: How do I increase the resolution of an image?
A: Upload it to an AI upscaler such as Kenerate, pick a size (for example 4K) and download the result. AI adds real pixels and rebuilds edges, so the higher-resolution image is sharper than one enlarged in a normal image editor. New accounts get 25 free credits on sign-up.

Q: Does changing DPI increase resolution?
A: No. DPI (or PPI) is only a print setting stored in the file. Changing 72 to 300 DPI without resampling keeps exactly the same pixels — the print just gets smaller. To really increase resolution you need more pixels, which is what upscaling adds.

Q: How do I increase resolution without losing quality?
A: Use an AI upscaler instead of a plain resize. Normal enlarging (bicubic) spreads existing pixels and looks soft; AI super-resolution adds plausible detail as it enlarges.

Q: Can I increase the resolution of a low-quality photo for free?
A: Kenerate gives 25 free credits on sign-up to test it, with no watermark.

Q: What resolution do I need to print a photo?
A: About 300 pixels per inch: 1200 × 1800 px for a 4×6 in print, 2400 × 3000 px for 8×10 in, 2480 × 3508 px for A4. Kenerate Upscale lets you pick an exact megapixel size.

Q: How do I increase image resolution on iPhone or Android?
A: Open kenerateai.com in your phone's browser, upload the photo to the upscaler and download the result — no app needed.

Q: How do I increase resolution in Photoshop?
A: Image → Image Size with Resample on adds pixels by interpolation; Camera Raw's Enhance → Super Resolution doubles the width and height with AI. See our step-by-step guide.

## Related pages
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- Bulk image upscaler: https://kenerateai.com/bulk-image-upscaler
- Remove glare from photo: https://kenerateai.com/remove-glare-from-photo
- Restore old photos: https://kenerateai.com/how-to-restore-old-photos
- Best photo restoration software: https://kenerateai.com/best-photo-restoration-software
- Denoise photos: https://kenerateai.com/how-to-denoise-photos
- Increase image resolution: https://kenerateai.com/how-to-increase-resolution-of-an-image
- Sharpen an image in Photoshop: https://kenerateai.com/how-to-sharpen-an-image-in-photoshop
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- Topaz Labs alternative: https://kenerateai.com/alternatives/topazlabs-alternative

## Sources
- Image resolution — Wikipedia: https://en.wikipedia.org/wiki/Image_resolution
- Pixel density (PPI) — Wikipedia: https://en.wikipedia.org/wiki/Pixel_density