Filery

Resize Video

Change a video's resolution to a preset or custom size.

Choose video file or drop it anywhere on this page MP4 · MOV · WEBM · MKV · AVI · WMV · FLV · M4V · 3GP · MPEG · +3 Processed on your device — never uploaded

How to resize video

  1. Drop a video in.
  2. Pick a resolution preset — 1080p, 720p, 480p — or enter custom dimensions.
  3. Resize and download. The output file will be considerably smaller if you are downscaling.

About this tool

Resizing and compressing are related but distinct operations. Compressing keeps the resolution the same and adjusts the bitrate to make the file smaller. Resizing changes the actual pixel dimensions. Often the most effective size reduction combines both: dropping from 4K to 1080p eliminates 75 percent of the pixels before the encoder even starts, meaning a much smaller file without needing aggressive compression on the remaining pixels.

The standard presets cover the most common use cases. Custom dimensions are there for specific platform requirements — some video hosting platforms enforce exact pixel counts, and advertising networks often specify unusual dimensions like 1200×628 or 600×500.

Questions

How much smaller will the file be at 720p versus 1080p?
Roughly two to three times smaller, because the total number of pixels drops by about 56 percent and the encoder can work with less data per frame. The actual ratio depends on the content — a static-heavy video compresses more than fast action.
Can I enlarge a video?
Technically yes, but there is no quality gain. Upscaling decodes every frame and re-encodes it at a larger size, which takes longer and produces a file that just has more pixels containing the same information, slightly softened by the upscale filter. Use AI upscaling for genuine quality improvement — this tool is intended for downscaling.
Why do dimensions have to be even numbers?
H.264 and VP9 encode in 16×16 or 8×8 macroblocks. Both codecs require frame dimensions to be divisible by 2, and most encoders require divisibility by 4 or more. Entering an odd number causes an encoder error — the tool rounds down automatically.