ActuallyOPClipsFree

Resize a thumbnail

Exact pixels and under the file limit, for YouTube, Twitch, CurseForge and Steam. Use an image, or grab a frame from a clip.

Local onlyYour file stays on this device

Free: one size at a time. Pro: tick several and get a zip.

YouTube

Twitch

CurseForge

Steam store

Steam library

Steam Workshop

Free or Pro

Free does one file at a time, up to 60 seconds out of a file up to 1 GB. Pro drops those limits, adds batch and saved presets. $3 a month. No watermark on either.

Go Pro

No key on this device.

How to use it

  1. Drop an image, or a clip to grab a frame from.
  2. Pick a size. Slide the position if the crop cuts off the wrong part.
  3. Save it. JPG quality drops by itself to stay under the platform limit.

Exact sizes

PlatformImagePixelsFile limit
YouTubeVideo thumbnail1280 x 7202 MB
Video thumbnail 4K3840 x 216050 MB
Channel banner2560 x 14406 MB
Profile picture800 x 8004 MB
TwitchOffline banner1920 x 108010 MB
Profile banner1200 x 48010 MB
Profile picture256 x 25610 MB
Panel320 x 1602.9 MB
CurseForgeProject logo400 x 400None stated
Gallery image1920 x 1080None stated
Steam storeHeader capsule920 x 430None stated
Small capsule462 x 174None stated
Main capsule1232 x 706None stated
Vertical capsule748 x 896None stated
Screenshot1920 x 1080None stated
Page background1438 x 810None stated
Bundle header707 x 232None stated
Steam libraryLibrary capsule600 x 900None stated
Library header920 x 430None stated
Library hero3840 x 1240None stated
Library logo1280 x 720None stated
Steam WorkshopWorkshop preview512 x 5121 MB

Steam sizes are from Steamworks documentation. YouTube and Twitch publish less, so those come from their help pages and what people report working. We couldn't find a published size for CurseForge project logos. Its modpack rules ask for 400 x 400, so that's what we use. Checked 7 Nov 2026.

Questions

What size is a YouTube thumbnail?

1280 x 720 still works everywhere and stays under the 2 MB phone limit. YouTube now takes 4K thumbnails up to 50 MB from a computer.

Why JPG and not PNG?

Game screenshots are huge as PNG and usually miss the limit. JPG at high quality looks the same. Pick PNG when you need transparency, like a Steam library logo.

Can I do every Steam size at once?

Yes, with Pro: tick as many sizes as you want and download a zip. Free does one at a time.