Are files uploaded for this tool?

This browser tool processes the selected media locally on this device. The file is not uploaded to ArtPlayer servers for this workflow.

Will the export have a watermark?

No. ArtPlayer browser tools do not add watermarks to exported files.

Why can processing take time?

The work runs in your browser, so speed depends on your device, browser, memory, source size, and the export settings needed for the result.

Which browsers work best?

Recent Chrome, Edge, and other modern Chromium browsers usually work best for heavier browser media processing.

What should I try if a large file fails?

Try a smaller source, close other heavy tabs, reduce resolution or duration first, and keep the tab open until the export finishes.

Can I keep the original aspect ratio?

Yes. Choose the original aspect option to resize by height while keeping the source proportions.

Will resizing crop the video?

No. Resize changes the output dimensions. Use Crop Video if you want to cut the frame to a different shape.

Can I resize video for Instagram, TikTok, or YouTube Shorts?

Yes. Choose a square, portrait, or landscape size that matches the platform, then export a new MP4 in the browser.

Does resizing change the file size?

Usually yes, especially when you reduce resolution. Use Compress Video afterward if you also need a smaller upload size.

Browser video tool

Resize Video

Local processingMP4 outputNo upload

Change video dimensions in the browser. Pick an aspect ratio, choose a size preset, and export a resized MP4.

Source video

Choose a file

Drop a file here, or click to choose one.

Aspect ratio

Keep original or choose a canvas.

Output size

Keep the original aspect ratio and resize height to 1080p.

720p1080p

How it works

Three steps to finish the browser workflow.

1
Choose a video file
Change video dimensions in the browser. Pick an aspect ratio, choose a size preset, and export a resized MP4.
2
Output size
Choose a video, pick the target shape and size, then ArtPlayer uses a browser-native media pipeline and exports a resized MP4.
3
Preview and Download
Check the finished result, then download the exported file.

Everything you need

Core details about privacy, browser support, output, and practical limits before you start.

Local processing

The selected video is processed locally in this browser with the Mediabunny/WebCodecs pipeline.

Common aspect ratios

Resize for original ratio, landscape, portrait, or square outputs.

Simple size presets

Pick HD or Full HD targets without writing scale and pad filters by hand.

Frequently asked questions

Find quick answers about privacy, browser support, exports, and what to try when a file is heavy.

Continue editing with nearby ArtPlayer tools that work with the same local, browser-first workflow.

Compress Video

Reduce video file size with simple presets and local FFmpeg processing.

Crop Video

Adjust framing with crop ratios and a visual crop guide for the final export.

Trim Video

Cut a clip by choosing exact start and end times before exporting a new MP4.

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