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SPECIFICTION
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Uncrop

uncrop.in

Free plan Web
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Spec score 7.0 #22 of 26 in AI Image Expanders

What it is

Uncrop is a free web tool for extending photos into layouts used by Instagram. It offers portrait (4:5), square (1:1), landscape (1.91:1), and Story/Reel (9:16) formats. Local expansion methods include edge pixel extrusion, symmetric reflection, ambient blur, and smooth smear. You can also choose blur, solid-color, gradient, or mirror-reflection backgrounds. Uploads support JPG, JPEG, PNG, WEBP, and HEIC. Uncrop says processing occurs in your browser, without sending photos to a server, and that photos and traces disappear when the tab closes or refreshes. Original content is not compressed or downsized, while downloads keep the upload format at the highest quality setting. There is no stated file-size limit, although files above 50MB may process more slowly in-browser. The responsive site works on modern smartphones and listed browsers, and processing can work offline after loading. All features are free without an account; advertising supports the plan. Gemini AI outpainting requires a paid Gemini API key.

Spec sheet

Purpose
Uncrop is an online tool for uncropping and extending photos for Instagram.Read 7 Oct 2026 · uncrop.in
Privacy
The FAQ says image processing happens in the browser and photos are not transmitted to a server.Read 7 Oct 2026 · uncrop.in
Background styles
The FAQ lists blur backgrounds, solid colors, gradient effects, and mirror reflections.Read 7 Oct 2026 · uncrop.in
External API option
The homepage says Gemini AI generative outpainting requires a paid Gemini API key.Read 7 Oct 2026 · uncrop.in
File size
The FAQ says there is no set file-size limit, though files over 50MB may take longer to process in the browser.Read 7 Oct 2026 · uncrop.in
Image formats
The FAQ says it supports JPG/JPEG, PNG, WEBP, and HEIC uploads.Read 7 Oct 2026 · uncrop.in
Image retention
The FAQ says photos are not stored and traces are removed when the tab is closed or refreshed.Read 7 Oct 2026 · uncrop.in
Instagram formats
It offers portrait (4:5), square (1:1), landscape (1.91:1), and Story/Reel (9:16) formats.Read 7 Oct 2026 · uncrop.in
Local expansion
The homepage lists edge pixel extrusion, symmetric reflection, ambient blur, and smooth smear as instant local expansion methods.Read 7 Oct 2026 · uncrop.in
Mobile and browsers
The FAQ says the responsive tool works on modern smartphones and lists Chrome, Safari, Firefox, Edge, and Samsung Internet.Read 7 Oct 2026 · uncrop.in
Offline use
The FAQ says photo processing and downloading can work offline after the page has loaded.Read 7 Oct 2026 · uncrop.in
Quality and downloads
The FAQ says the original content is not compressed or downsized and downloads retain the upload format at the highest quality setting.Read 7 Oct 2026 · uncrop.in

Plans and prices

Free Free All features · no account or sign-up · supported by non-intrusive advertising Read 7 Oct 2026 · uncrop.in

Every Uncrop plan and price →

Strong points and limits

Strong points

  • Supports four Instagram aspect-ratio formats
  • Accepts JPG, PNG, WEBP, and HEIC
  • Browser processing keeps photos off servers
  • Original content is not compressed or downsized
  • Free plan includes all features without sign-up

Limits

  • Files over 50MB may process more slowly
  • Gemini AI outpainting needs a paid API key
  • Advertising supports the free plan

Who it suits

It suits Instagram users who need to expand images in specific post or Story formats. It also fits people seeking browser-based, local processing and offline use after loading.

Verdict

Uncrop covers common Instagram layouts with several local expansion and background choices. Its browser processing, format preservation, and free no-account plan are clear strengths, while Gemini AI outpainting requires separate paid API access.

Where Specifiction places it

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