Film Frame Generator

Create Cinematic Letterbox Mattes Ready for Any Editing Workflow

FrameGen lets you design precise letterbox overlays straight in the browser. Choose your delivery format, tweak matte thickness and corner radius, and export transparent PNG files that drop directly into Premiere Pro, Final Cut, CapCut, or DaVinci Resolve.

The tool outputs 1080p and 4K variants for each aspect ratio—including 5120×1080 ultra-wide—so teams can keep consistent branding across short-form and long-form video. No plug-ins, subscriptions, or complicated templates required.

How to export a matte

1. Pick the delivery ratio. Select the preset that matches your platform or screen requirements.
2. Lock in output resolution. Toggle between 1080p and 4K. Ultra-wide presets include dual-monitor friendly dimensions.
3. Adjust the matte aesthetics. Use Matte Thickness and Edge Treatment controls to dial in the border weight and corner rounding.
4. Preview and download. Generate the PNG and drag it onto the top track of your editing timeline.

FrameGen Studio

Craft cinematic mattes, control ratios, and export transparent PNGs in seconds.

Aspect Ratio & Format

Select your target format for professional delivery

Export Quality

Matte Thickness

Edge Treatment

California coastline cliffs captured at golden hour for frame preview

Output Summary

Aspect Format

5120×1080

5120 × 1080px output

Matte Style

Medium

Sharp corners • PNG alpha

Compatible video editors

FrameGen PNG overlays respect alpha transparency, so they import cleanly into most NLEs and mobile editors. Popular workflows include Premiere Pro, DaVinci Resolve, Final Cut Pro, After Effects, CapCut, VN Video Editor, and InShot. You can also layer the mattes on LED walls or livestream switching software such as OBS.

Delivery suggestions

Use thin mattes for narrative or documentary projects where titles sit inside the frame.
Choose rounded corners when designing overlays for modern social feeds or tech brands.
Print the output summary to keep shot specs aligned across collaborators.

FAQ

Will the PNG work in mobile editing apps?: Yes. Exported files are lightweight and maintain transparency, so they drop onto CapCut, VN, and InShot timelines without extra blending steps.
Can I customise sizes?: Select the closest preset and adjust thickness. A custom ratio builder is on the roadmap; contact us if you need early access.