How to enlarge a photo without Topaz
- Open: drop photos on the tool, tap Choose images, or paste. JPG, PNG, WebP and HEIC work.
- Choose 2×, 4× or 4K (3840 px on the long side).
- Press Upscale image. The 4.9 MB model downloads once, then runs on your device.
- Compare with the slider or Zoom 100%, then Download or Download all (.zip).
What you get compared with Topaz Gigapixel
Topaz Gigapixel AI is paid desktop software for Windows and Mac with several upscaling models, face recovery and very large outputs. If you need to enlarge photos now, for free and without installing anything, this page does the core job: a Real-ESRGAN super-resolution model — the same open model family behind free desktop tools — redraws edges, texture and fine detail as it enlarges 2× or 4×, and the 4K preset gives a 3840 px long side. Because the model runs on your own device, there are no credits, no daily cap, no watermark and no upload. Where Gigapixel is ahead: output beyond 4096 px, specialised models for faces and low-light, and raw speed on large files. For web images, wallpapers, prints up to about A4 at 300 DPI and quick fixes on a phone, a browser upscaler is usually enough. Try your own photo above and judge the result at 100% zoom.
Facts at a glance
| Question | Answer |
|---|---|
| Price | 100% free, unlimited — there is no paid plan, credits or daily cap |
| Sign-up | Not needed — no account, no email |
| Watermark | None, on every download |
| Upload | None — images are processed on your device and never sent to a server |
| AI model | Real-ESRGAN general-x4v3 (BSD-3 licence, 4.9 MB, downloaded once and cached) |
| Runs on | WebGPU in Chrome, Edge and Safari; falls back to WebAssembly (CPU) elsewhere |
| Modes | Enhance (clean + sharpen), Unblur (Light / Medium / Strong), Upscale (2×, 4×, 4K) |
| Output size | 2× or 4×, or 4K = 3840 px on the long side (3840×2160 for 16:9); max 4096 px |
| Large originals | Fed to the model at up to 1024 px (GPU) or 640 px (CPU) on the long side, then enlarged 4× |
| Formats | JPG, PNG, WebP and iPhone HEIC in; JPG, PNG or WebP out (HEIC becomes JPG), PNG transparency kept |
| Batch | Yes — add many images, download one by one or as a ZIP |
| Limits | Speed depends on your device; detail that was never captured can't be recovered, only redrawn |
Topaz Gigapixel vs this free upscaler
| This page | Topaz Gigapixel AI | |
|---|---|---|
| Price | Free, unlimited | Paid licence or subscription |
| Install | None — works in the browser, also on phones | Desktop app for Windows / Mac |
| AI model | Real-ESRGAN general-x4v3 | Several proprietary models |
| Scale | 2×, 4×, 4K (max 4096 px) | Higher scales and larger outputs |
| Unblur / sharpen | Yes — Unblur Light, Medium, Strong | Yes |
| Face recovery | No dedicated face model | Yes |
| Batch | Yes, ZIP download | Yes |
| Privacy | Runs on your device, no upload | Runs on your computer |
Topaz features are described from its public product pages and change over time; check its site for the current list and price.
When the free upscaler is enough
- Web and social images: 2× or 4× makes small pictures crisp on high-DPI screens.
- Wallpapers: the 4K preset gives 3840×2160 from a 16:9 picture.
- Prints up to about 8×10 in at 300 DPI: a 800×1000 px photo at 4× becomes 3200×4000 px.
- Old scans and compressed JPEGs: blocks and noise are cleaned while enlarging.
- On a phone or a work computer where you can't install software.
Frequently asked questions
Is there a free alternative to Topaz Gigapixel AI?
Yes. This page enlarges photos 2×, 4× or to 4K with the Real-ESRGAN AI model, free with no limit, no install, no sign-up and no watermark.
Is it as good as Topaz Gigapixel?
For most web images, wallpapers and moderate prints the result is close. Gigapixel has more models, face recovery and larger outputs; test your own photo here at 100% zoom.
Do I need to install anything?
No. It runs in Chrome, Edge, Safari or Firefox on a computer or phone. The 4.9 MB model downloads once and is cached.
Are my photos uploaded?
No. The AI runs on your device with WebGPU or WebAssembly; photos never leave it.
How large can I enlarge a photo?
2×, 4× or 4K (3840 px long side), up to 4096 px.
Can I upscale many photos at once?
Yes. Add several, press Upscale all and download a ZIP.
Updated · By the imagetojpg.app team