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Enhance Picture

Free image resolution upscaler

Increase resolution of image online free

Need more pixels? Drop an image below and let the AI rebuild detail at 2× or 4× the original resolution — a 1080p photo becomes 4K or 8K with sharp edges and natural texture. Everything runs on your device: no upload, no account, no watermark.

The scale is preset to 4× on this page. Switch to 2× or 1× any time.

  • Always free
  • No account
  • Up to 4× resolution
  • AI-powered detail
  • No file-size limit
  • Runs on your device

Drop a picture here — AI enhancement starts on its own

JPG, PNG or WebP — up to 20 pictures at once

How to increase image resolution online free

Three steps — free, fast, and the image never leaves your browser.

  1. Add the image you want to upscale

    Drag a JPG, PNG or WebP file onto the drop zone, tap Choose pictures, or paste with Ctrl+V (⌘V on Mac). Up to 20 images per batch — the tool handles them one by one.

  2. Pick a resolution multiplier

    This page starts at 4× — a 1000×750 image becomes 4000×3000. Switch to 2× if you only need a moderate boost or 1× if you want quality cleanup without resizing. Press Enhance with AI and the Real-ESRGAN model runs entirely on your device.

  3. Compare and download

    Drag the split slider to compare the upscaled result with the original. Fine-tune brightness, contrast or sharpness if needed, then press Download enhanced. Download all saves every image in the batch at once.

What each source size becomes

Common starting resolutions and the output at 2× and 4× AI upscale.

Source2× output4× output
640 × 480 (VGA)1280 × 9602560 × 1920
1280 × 720 (HD)2560 × 1440 (QHD)5120 × 2880 (5K)
1920 × 1080 (Full HD)3840 × 2160 (4K UHD)7680 × 4320 (8K)
3024 × 4032 (iPhone)6048 × 806412096 × 16128

Questions about increasing image resolution

How much can I increase the resolution?
Up to 4× in each dimension. A 1920×1080 image becomes 7680×4320 (8K) at the 4× setting. The AI model fills in plausible detail rather than just stretching pixels, so edges stay sharp and textures look natural even at the highest multiplier.
Does increasing resolution really add detail?
Real-ESRGAN was trained on millions of photo pairs at different resolutions, so it learns what fine detail should look like given the surrounding pixels. It cannot recover information that was never captured — it cannot unblur a truly out-of-focus shot — but for clean images that simply have too few pixels it produces results close to what a higher-resolution capture would have looked like.
Is it actually free with no catch?
Yes. There is no account, no watermark, no daily limit, and no premium tier. The tool runs entirely in your browser — there is no server cost to recoup, which is why there is no paywall.
What is the maximum file size I can upscale?
There is no upload limit because nothing is uploaded. The practical constraint is your device's memory: most phones and laptops handle source images up to about 12–15 megapixels comfortably at 4×. Very large images (20 MP+) work best at 2× or may need a device with more RAM.
Will the upscaled image lose quality from re-encoding?
JPEG and WebP files are re-encoded at quality 0.92 — visually transparent for photographs. PNG files are saved losslessly with transparency intact. Each image downloads in the same format it was added in.
Can I increase the resolution of multiple images at once?
Up to 20 per batch. The same scale setting applies to all of them, and Download all saves every upscaled file in one go.
Do my images get uploaded to a server?
No. Decoding, AI upscaling and re-encoding all happen in your browser tab through WebGPU or WebAssembly. No image, filename or pixel ever leaves your device. The only network request is a one-time 4.9 MB model download, cached after first use.
What formats does it support?
JPEG, PNG and WebP — the three most common image formats on the web. Each file is output in the same format it came in, so a PNG with transparency stays a transparent PNG after upscaling.

How the AI increases resolution

Traditional upscaling — bicubic, Lanczos — just interpolates between existing pixels. The result is larger but blurry, because no new information is added. Real-ESRGAN works differently: it was trained on millions of image pairs at low and high resolution, so it learns what sharp detail should look like given the surrounding context. When it upscales your image it generates plausible texture, clean edges and fine grain that the original resolution could not represent.

The model runs entirely on your device through WebGPU (or WebAssembly on older hardware). It processes the image in overlapping tiles at 4× and stitches them together seamlessly. At the 2× setting it still computes the full 4× pass internally and downsamples to 2×, which gives a sharper result than a native 2× model would.

If your image already has enough pixels but looks bad — compression artifacts, noise, dull colour — resolution is not the problem. The enhance photo quality page runs the same AI at 1× to clean up without resizing. For the full range of options, start from the main picture enhancer or the enhance picture resolution page.

No upload, no file-size cap

Everything runs in your browser through the Canvas API and on-device AI — there is no server that receives your image. That means no upload wait, no file-size restriction, and no risk of your photo being stored or inspected. The only download is the one-time 4.9 MB AI model on first use; after that the upscaler works offline.