AltF Creator

Video aspect ratio and crop calculator

Enter a ratio and one side and the calculator gives the other, rounded to the even numbers video encoders expect. Pick a source and target format to see whether the whole frame fits with bars, or how much is cropped when it fills the screen - for example, a 16:9 video filling a 9:16 phone screen loses about two-thirds of its picture.

  • Free, no sign-up
  • Runs in your browser
  • Limits sourced from each platform
  • No fake scores or view predictions

Runs in your browser — nothing is uploaded.

Common creator formats

  • 16:9 - YouTube videos, thumbnails, LinkedIn and X landscape video.
  • 9:16 - Shorts, Reels, TikTok and Stories.
  • 4:5 - Instagram portrait feed posts.
  • 1:1 - square posts and podcast cover art.
  • 2:3 - standard Pinterest pins.

Shoot once, publish everywhere

If a video will be cut for both YouTube and Shorts, frame the subject in the centre third of a 16:9 shot. That centre strip is what survives a 9:16 crop. The vertical safe-zone previewer shows where each app's buttons cover the frame.

Video aspect ratio and crop calculator: questions and answers

Why round to even numbers?

Most video encoders (H.264 with 4:2:0 colour) need even width and height. Odd sizes get padded or rejected.

What is the difference between fit and fill?

Fit shows the whole frame and adds bars. Fill covers the screen and crops the edges. The calculator shows both.

Creator tools and guides

Full creator studioAll seven tools, the workflow, platform limits and the tool directory.YouTube title length checkerCheck a YouTube title's length, keyword position and readability, preview it as a search result, and compare two titles. Free, in your browser.YouTube chapters generator and timestamp checkerPaste your timestamps, fix every error YouTube would reject (00:00 start, 3+ chapters, 10 seconds each) and copy a clean chapter list for your description.Hashtag cleaner and counterPaste messy tags and get clean, unique hashtags checked against each platform's rules: YouTube's 60-hashtag cap, Instagram's 30, TikTok and X caption counts.Social media character limits, with a live checkerCharacter limits for YouTube, Instagram, TikTok, X, Threads, LinkedIn, Pinterest and Facebook, with a live checker that shows what appears before "more".YouTube thumbnail size and requirementsYouTube thumbnail size, minimum width, file size limit and aspect ratio from YouTube Help, plus a calculator for any canvas and crop.YouTube earnings calculator (with your own RPM)Estimate YouTube ad revenue from your own RPM and views, price a sponsorship from a CPM, and work out engagement rate. No made-up averages.Upload schedule planner and content calendarPick your posting days, add a working title to each slot and export the plan to Google Calendar, Apple Calendar or Outlook as an .ics file.YouTube Shorts guide: length, size and what to checkYouTube Shorts length (up to 3 minutes), vertical 9:16 size, thumbnails, hashtags and a checklist for your first Shorts, with free tools.Instagram Reels guide: size, captions and hashtagsInstagram Reels size (1080 x 1920), caption limit (2,200 characters, ~125 shown), hashtag limit (30) and a checklist, with free checking tools.TikTok caption length and hashtag guideTikTok caption limit (4,000 characters), bio limit (80), username limit (24), how hashtags count and how to write captions that get read.The video creator workflow, step by stepA practical step-by-step video creator workflow from idea to analytics, with a free AltFTool tool for each stage.

69 free creator tools on AltFTool

Focused tools for one job each, grouped by the part of the work they help with. Each tool says whether it runs in your browser or uses a server.

Video editing and files

Captions, subtitles and transcripts

Titles, thumbnails and descriptions

See all 69 creator tools

Get your channel found

Links from real, relevant sites help a channel, podcast or portfolio show up in search. These AltFTool lists are checked by hand; pick the ones that fit your niche and skip any that ask you to pay for links.

Free backlink sitesA checked list of sites where you can list a channel, podcast or portfolio.Community and social sitesProfiles and communities where a creator link is allowed.Content platformsPlatforms where you can republish or embed your work.Free directory submissionsDirectories that accept a free listing.Image promptsPrompt ideas for thumbnails and channel art.Free AI toolsFree AI tools for scripts, voice and editing.

Everything you type into AltF Creator stays in your browser. Your upload plan is saved on this device only, and nothing is sent to AltFTool or any platform.