Alternatives & comparisons

Previewed alternative: 3D mockups and videos, free

A Previewed alternative that runs in your browser: 3D device mockups and promo videos, free images, no signup, nothing uploaded, fair source.

Published September 4, 2026

Previewed is a web-based mockup generator with a strong template angle: pick a scene, drop your screenshot in, and get a device mockup or an animated clip without touching a 3D control. That template-first approach is exactly why some teams love it and others outgrow it. OpenMock takes the opposite bet — a real 3D camera you drive yourself — and this page lays out where each approach wins.

What Previewed does well

Previewed is a browser-based mockup and app-preview generator built around templates for images, App Store screenshots and animated 3D scenes.

• Fast, template-driven results with little learning curve
• Store-screenshot templates with text and layout baked in
• Runs in the browser, so no installs

Where OpenMock is different

OpenMock is a browser-based studio for putting screenshots and screen recordings on 3D devices and turning them into promo videos. The differences that matter for someone comparing it with Previewed:

• A camera, not a template. In OpenMock you pan, zoom, tilt and roll a real 3D camera and keyframe it on a timeline. Templates get you to a result quickly; a camera gets you to your result.
• Local-only processing. Files never upload; there is no account. For teams under NDA or pre-launch, that is the whole decision.
• Free images, forever. Still exports have no watermark and no signup at any size, including transparent PNG.
• Video-grade effects. Adaptive motion blur, depth of field, screen glow, bloom, film grain, glass edge lighting and HDRI environments — the things that make a clip look filmed rather than generated.
• Fair source. The renderer and export pipeline are public code on GitHub.

Side by side

When to stay with Previewed

If you need finished App Store screenshot layouts — headline text, background, device, all in one template across ten screens and several languages — Previewed's template system is built for that job and OpenMock is not a screenshot-set tool. Stay with it for bulk store-listing production.

When OpenMock is the better fit

• You want control over the exact camera move and lighting rather than a preset
• Your recordings and screenshots must not leave your machine
• You want free, unwatermarked still images
• You are producing promo video — timeline, keyframes, motion blur, audio
• You want to know exactly what the tool does with your files (read the source)

Try it in two minutes

Open OpenMock, pick a device, drop in a screenshot or screen recording, move the camera, export. If the result isn't what you wanted, you have lost two minutes and no personal data.

FAQ

Is OpenMock a free Previewed alternative?

For images, completely: PNG, JPEG and WebP exports are free with no signup or watermark. Video exports are free at up to 720p/30 fps with a watermark; Pro ($5/month or $36/year) removes it and unlocks 4K and 60 fps.

Does OpenMock upload my screenshots or recordings?

No. Rendering, decoding and encoding all happen in your browser with WebGL and WebCodecs. Nothing is sent to a server and there is no account to create.

Does OpenMock have App Store screenshot templates like Previewed?

OpenMock has App Store canvas presets (iPhone 1290 × 2796, iPad 2064 × 2752, Mac 2880 × 1800) and custom sizes, plus text shots for headlines — but it is a 3D scene tool, not a multi-screen template system. For a ten-screenshot localized set, a template tool is faster; for hero shots and video, OpenMock is.

Is OpenMock harder to learn than Previewed?

A first render takes about two minutes: pick a device, drop media, move the camera, export. The depth is optional — keyframes, effects and multi-shot timelines are there when you want them.

This comparison describes Previewed from its public materials as of September 2026. Features and prices change — check the Previewed site for current details.