Screenshot Studio
App Store screenshots
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Online Screenshot Editor and Mockup Maker

Screenshot Studio is an open-source screenshot editor that runs entirely in your browser. Drop in a screenshot and turn it into a professional graphic: add a gradient background, wrap it in a Safari or Chrome browser mockup, tune the padding, corner radius, and shadow, tilt it in 3D, then export PNG, JPEG, WebP, MP4, WebM, and GIF. Editing runs on your device and imported images are not uploaded to edit them; only export compression sends the finished image to the server, which returns it without storing it. There is no signup, no watermark, and no paid tier.

What you can do here

  • 250+ gradient, mesh, and solid backgrounds
  • Safari and Chrome browser mockups in light and dark mode
  • Arc, macOS, and Windows window frames plus Polaroid, glass, outline, and border image frames
  • 3D perspective transforms with fully configurable shadows
  • 40+ animation presets driven by a keyframe timeline editor
  • Video export to MP4, WebM, and GIF, encoded in the browser with FFmpeg WASM
  • Text and image overlays with 32 Google Fonts
  • Tweet-to-image and code-snippet capture with 14 syntax themes
  • High-resolution PNG, JPEG, and WebP export up to 5x scale
  • 17 iPhone, MacBook, and Apple Watch device mockups

Who it is for

Developers polishing README, changelog, and documentation images; marketers building launch graphics and social posts; and designers presenting work without leaving the browser.

Explore the editor

Standalone editors

Image tools

Browser-based utilities that never upload your files. See the full image tools hub.

How it compares

Side-by-side breakdowns against the tools people weigh this one against. Start at the comparison hub.

Documentation and machine-readable resources

Any page on this site also serves Markdown to clients that send an Accept: text/markdown request header. Frames available: Safari and Chrome browser mockups plus Arc, macOS, and Windows window frames, each in light and dark, and Polaroid, glass, outline, and border image frames.

Common
Questions.

Quick answers about Keliuz, exports, and how it works in your browser.

Keliuz is a free, browser-based screenshot editor that turns everyday captures into presentation-ready visuals. It offers 250+ backgrounds, Safari and Chrome browser mockups, 3D perspective effects, an animation timeline with 43 presets, and video export. It is open-source under Apache 2.0, requires no account, needs no download, and leaves no watermarks.
Yes. Keliuz is 100% free with no hidden costs. Unlimited exports, all features, no watermarks. No signup required.
No. Just open the editor and start creating. Your work saves automatically in your browser with unlimited undo/redo.
Yes. Keliuz runs entirely in your browser, so there is nothing to download and nothing to install. Open the editor and start adding backgrounds, shadows, frames, and 3D effects to your screenshots straight away.
Safari and Chrome browser mockups plus Arc, macOS, and Windows window frames, each in light and dark, and Polaroid, glass, outline, and border image frames, plus 3D perspective transforms and customizable shadows with blur, spread, and color controls.
Still images export as PNG, JPEG, and WebP, and animations export as MP4, WebM, and GIF. Export up to 5x resolution, and PNG keeps transparency.
Yes. The timeline editor ships 43 animation presets covering zoom, pan, rotate, and 3D perspective moves. Add keyframes, preview in real time, and export as MP4, WebM, and GIF.
Yes. Paste a tweet URL to capture it as a high-resolution image in light or dark theme. The code snippet generator supports 14 syntax themes, 20 programming languages, and 10 monospace fonts.
It is purpose-built for making screenshots presentable rather than for general image editing: one-click design presets, 250+ backgrounds, 17 device mockups, 3D perspective transforms, an animation timeline, and video export. All of it is free, watermark-free, and needs no account.
No. Editing runs in your browser and imported images are not uploaded to edit them. Only export compression sends the finished image to the server, which recompresses it in memory and returns it without storing it.

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Join thousands of creators making beautiful images.

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