Free ToolLive

Video Upscaler

Increase video resolution 2× or 4× using a fast single-pass Lanczos scaler in your browser. No model download required. Your video never leaves your device.

2× · 4× upscalingBrowser-basedNo model downloadFree to useMP4 · WebM · MOV

Watch the workflow

Single-pass Lanczos upscaling — 2× or 4× in your browser

Scale:

Enhancement:

Enhanced Lanczos 2× — denoise + sharpen for a genuinely cleaner result

The default — light denoise, edge sharpen, and a touch of contrast. This is a classical enhancement pipeline (no AI model) — it can't invent detail, but it makes footage visibly cleaner and crisper at the larger size.

Drop a video to upscale 2×

MP4, WebM, MOV, AVI, MKV & more · max 200 MB · max 300s · max 1920px · never uploaded · add multiple videos

Runs entirely in your browser — nothing is uploaded. Short clips finish fastest.

In-browser enhanced upscaling

Lanczos scale + light denoise + edge sharpen + micro-contrast — cleaner, not just bigger
Shorter, lower-resolution clips process fastest; 4× and long clips take longer
Clips over 300s or 1920px will be rejected — trim first

How it works

Drop an MP4, WebM, or MOV clip — input up to 1080p (1920px longest edge)
The clip is upscaled with a single-pass Lanczos scaler — no model download required
Output: 2× → up to 3840×2160 (4K) · 4× → up to 7680×4320 (8K) — capped at 8192px
Estimated time: ~3–5 min for a 30s clip at 720p · ~10–15 min at 1080p (varies by device)
Your video is never sent to any server — 100% private

Common use cases

Upscale old footage

Bring vintage or low-resolution video recordings up to modern HD clarity.

Social media clips

Increase resolution of short clips before uploading to TikTok, Reels, or YouTube Shorts.

Client deliverables

Provide higher-resolution outputs without re-shooting when only a standard-def master exists.

Archive restoration

Upscale digitised archive footage to improve legibility and visual quality.

Frequently asked questions

Is my video uploaded to a server?

No. The Lanczos scaler runs entirely in your browser. Your video never leaves your device.

What does 4× mean for video?

Every frame is enlarged to 4× its original pixel count. A 720p input (1280×720) becomes 5120×2880 (5K). 1080p input (1920×1080) is the maximum — it produces 7680×4320 (8K) which is the browser GPU limit.

Can I queue multiple videos?

Yes. Drag in multiple files and they'll queue up automatically. You can cancel or retry any job individually.

What format is the output?

MP4 (H.264) with faststart — universally playable and scrubbable everywhere, and the original audio is preserved. You can convert to WebM or another container with the Video Editor or a format converter afterward.

Frame pipeline

Every frame follows the same scaling contract

The clip is decoded, resized frame by frame, and reassembled with timing and audio preserved for preview and editor continuation.

Frame accurate

Processing model

Measured cadence

Frames are emitted at the clip cadence so playback does not silently speed up or slow down.

Visible output checks

The finished result is previewable before download instead of being accepted as an opaque blob.

Editor-ready handoff

Filename, MIME type, duration, dimensions, audio, and the processed blob move together.

Know before you process: Long 4K clips can exceed browser memory; shorter segments and a 2× pass are the safer starting point.

Ready to try it?

Free, private, no signup.

Upscale a video →