What Is ImageSizeFor? A Free Tool for Every Platform's Exact Image Size

If you've ever uploaded a photo to Etsy, LinkedIn, or YouTube and watched it come out cropped wrong, stretched, or blurry, you've run into the same problem everyone runs into: every platform wants a different exact size, and almost none of them tell you clearly before you upload.

ImageSizeFor exists to fix that one problem, well.

What this site actually does

Pick a platform, upload your photo, and get back an image resized to that platform's exact recommended dimensions - correctly cropped, correctly proportioned, ready to upload. That's the whole idea. No editing suite to learn, no plugins, no account to create.

Right now, ImageSizeFor covers:

• Etsy - listing photos, square listings, shop banners, shop icons
• LinkedIn - profile photos, profile banners, company page banners
• YouTube - channel banners, profile pictures, video thumbnails
• Discord - server icons, custom emojis, server banners
• Steam - header, small, and main store capsules
• Instagram - square posts, portrait posts, Stories and Reels

More platforms get added as we research and verify their current requirements - specs change over time (Steam doubled its capsule resolutions in 2022, for example), so each page reflects the platform's actual current guidelines, not outdated numbers copied from an old blog post.

Why it's free and doesn't ask for an account

Every resize happens directly in your browser using the Canvas API built into modern web browsers. Your photo is never uploaded to a server, never stored, and never seen by anyone but you. That's not a privacy feature we bolted on - it's the actual architecture. There's no server for your image to go to in the first place, which is also why there's no waiting and no account needed. Drop a photo in, and the result is ready in seconds.

Why exact dimensions matter more than people expect

A photo that's the wrong size doesn't just look slightly off - platforms often crop it automatically to force it into the space they have, which can cut off faces, logos, or important text without asking you first. Getting the dimensions right the first time means what you designed is what actually shows up.

What's next

We're adding platform pages one at a time, each backed by real research into what people are actually searching for and what each platform currently requires - not guesswork. If there's a platform you'd like to see covered, the contact page is open.

Ready to try it? Browse all platforms and resize your first image.