Free Image Size Checker
Drop any image to see its dimensions, file size, and aspect ratio — and find out which of 10 social platforms it fits. 100% private, runs in your browser.
Drop an image here, or click to choose
We'll show its size in pixels, megabytes, and which networks it's the right shape for. JPG, PNG, WebP, GIF, AVIF, HEIC, SVG.
Your image never leaves your browser. Inspection happens on your device.
The most thorough Image Size Checker
Every dimension, every aspect ratio, every file-size cap — across 10 social networks, in one place.
Pixel-Perfect Inspection
See dimensions, file size, format, and aspect ratio for any image — instantly. JPG, PNG, WebP, GIF, AVIF, HEIC, and SVG supported.
10-Platform Fit Check
Pass / Warn / Fail badges for every major social network — Instagram, TikTok, YouTube, X, LinkedIn, Pinterest, Facebook, Threads, Bluesky, Snapchat.
100% Private
Your image never leaves your browser. Inspection happens on your device — nothing uploaded, nothing tracked.
Bulk Mode
Drop multiple images at once. Sortable summary table with width, height, file size, format, and surfaces fitting. Export to CSV.
Aspect Ratio + Fix Tips
Reduces every image to its real aspect ratio (1:1, 4:5, 9:16, 1.91:1...) and tells you exactly how to crop it for each platform.
File-Size Limits Built In
Every platform has a different ceiling — YouTube thumbnails cap at 2 MB, Bluesky at 1 MB. We check every limit so you don't have to.
Cheatsheet, Always Current
Below the tool: every platform spec verified against official docs and refreshed every six months. Bookmark this page.
100% Free, No Signup
No paywall, no watermark, no account. Just drop your image and get answers.
How to Check Image Size and Dimensions
Every social network has different rules. Instagram wants 1080×1350 portrait. YouTube thumbnails are capped at 2 MB. Bluesky enforces a 1 MB hard limit on every image. Posting the wrong size means your image gets cropped, blurred, or rejected outright. Here's the fastest way to check — on any device.
In a browser (any device)
Drop the image into the tool above. You'll see width × height in pixels, file size in megabytes, format, and aspect ratio in under a second. Below the stats you'll see Pass / Warn / Fail badges for every social platform — so you don't have to memorise anyone's spec sheet.
On a Mac
Right-click the image in Finder → Get Info. The More Info section shows dimensions and the General section shows file size. Or hit Space on the file to use Quick Look — dimensions appear at the bottom of the preview.
On Windows
Right-click in File Explorer → Properties → Details tab. Scroll to find Dimensions and Size. For a quicker peek, just hover the file in File Explorer's details view — dimensions show in the status bar.
On iPhone
Open the image in Photos, swipe up, and you'll see resolution and file size at the bottom. iPhone shoots in HEIC by default — if you upload directly to a desktop platform, convert to JPG first. (You can also drop the HEIC file straight into this tool — we read it.)
On Android
Open the image in Google Photos, tap the three-dot menu → Details. You'll see resolution, file size, and the date it was captured.
Why social media platforms care about image size
Each platform recompresses everything you upload. If your source image is too small, the platform upscales it and adds blur. If your aspect ratio doesn't match the surface, it crops your image — usually badly. If the file is over the platform's cap, the upload silently fails or strips the image. Checking before you post saves a re-edit cycle every single time.
Social Media Image Sizes — 2026 Cheatsheet
The dimensions every social platform actually wants — verified against the official docs and refreshed every six months. Bookmark this page and ignore the outdated cheatsheets floating around Pinterest.
Last verified: April 2026
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| Instagram Feed (square) Classic 1:1 feed post. Instagram still accepts square uploads alongside 4:5. | 1080×1080 px | 1:1 | 30.00 MB | JPG, PNG, WebP |
| Instagram Feed (portrait) The default profile-grid format since January 2025. Best for organic reach. | 1080×1350 px | 4:5 | 30.00 MB | JPG, PNG, WebP |
| Instagram Feed (landscape) Centre-cropped to 4:5 on the profile grid — leave headroom. | 1080×566 px | 1.91:1 | 30.00 MB | JPG, PNG, WebP |
| Instagram Story / Reels Keep important content inside the centre safe-zone — top/bottom 250 px get UI overlays. | 1080×1920 px | 9:16 | 30.00 MB | JPG, PNG, WebP |
| Instagram Profile Photo | 320×320 px | 1:1 | 8.00 MB | JPG, PNG |
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| Facebook Feed Post Same 1.91:1 ratio used for link-preview thumbnails. | 1200×630 px | 1.91:1 | 30.00 MB | JPG, PNG, WebP |
| Facebook Cover Photo Displays 820 × 312 on desktop, 640 × 360 on mobile — render the safe area centred. | 1640×859 px | 1.91:1 | 100.00 MB | JPG, PNG |
| Facebook Profile Photo | 320×320 px | 1:1 | 30.00 MB | JPG, PNG |
| Facebook Story | 1080×1920 px | 9:16 | 30.00 MB | JPG, PNG |
| Facebook Event Cover | 1920×1005 px | 1.91:1 | 30.00 MB | JPG, PNG |
TikTok
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| TikTok Video Vertical 9:16 cover thumbnails. Centre safe-zone — view counts overlay the bottom-left of the profile grid. | 1080×1920 px | 9:16 | 287.00 MB | JPG, PNG |
| TikTok Profile Photo | 200×200 px | 1:1 | 5.00 MB | JPG, PNG |
YouTube
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| YouTube Thumbnail YouTube enforces a 2 MB hard limit on custom thumbnails. | 1280×720 px | 16:9 | 2.00 MB | JPG, PNG, GIF |
| YouTube Channel Art Safe area for TV: 1546 × 423 centred. | 2560×1440 px | 16:9 | 6.00 MB | JPG, PNG |
| YouTube Profile Photo | 800×800 px | 1:1 | 4.00 MB | JPG, PNG |
| YouTube Shorts | 1080×1920 px | 9:16 | 256.00 MB | JPG, PNG |
X (Twitter)
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| X (Twitter) In-Stream Image Crops to 16:9 on the timeline. Single 1.91:1 also accepted for link cards. | 1600×900 px | 16:9 | 5.00 MB | JPG, PNG, WebP |
| X (Twitter) Header Profile photo overlaps the bottom-left — keep that zone clear. | 1500×500 px | 3:1 | 5.00 MB | JPG, PNG |
| X (Twitter) Profile Photo | 400×400 px | 1:1 | 2.00 MB | JPG, PNG |
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| LinkedIn Feed Post Same ratio used for link-preview thumbnails. | 1200×627 px | 1.91:1 | 5.00 MB | JPG, PNG, GIF |
| LinkedIn Cover Banner Profile photo overlaps the bottom-left — keep that zone clear on personal profiles. | 1584×396 px | 4:1 | 8.00 MB | JPG, PNG |
| LinkedIn Profile Photo | 400×400 px | 1:1 | 8.00 MB | JPG, PNG |
| LinkedIn Company Cover | 1128×191 px | 5.91:1 | 8.00 MB | JPG, PNG |
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| Pinterest Pin (standard) 2:3 vertical pins are the default Pinterest format and rank best in feeds. | 1000×1500 px | 2:3 | 32.00 MB | JPG, PNG, WebP |
| Pinterest Pin (long / Idea) Long pins crop to standard 2:3 in some surfaces. | 1000×2100 px | 1:2.1 | 32.00 MB | JPG, PNG, WebP |
| Pinterest Profile Photo | 165×165 px | 1:1 | 10.00 MB | JPG, PNG |
| Pinterest Board Cover | 600×600 px | 1:1 | 10.00 MB | JPG, PNG |
Threads
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| Threads Feed Image Threads inherits Instagram-style aspect ratios (1:1, 4:5, 1.91:1). | 1080×1350 px | 4:5 | 30.00 MB | JPG, PNG, WebP |
Bluesky
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| Bluesky Feed Image Bluesky enforces a hard 1 MB per-image limit. | 1200×630 px | 1.91:1 | 1.00 MB | JPG, PNG, WebP |
| Bluesky Banner | 1500×500 px | 3:1 | 1.00 MB | JPG, PNG |
| Bluesky Avatar | 400×400 px | 1:1 | 1.00 MB | JPG, PNG |
Snapchat
| Surface | Recommended | Aspect | Max size | Formats |
|---|---|---|---|---|
| Snapchat Snap | 1080×1920 px | 9:16 | 32.00 MB | JPG, PNG |
| Snapchat Profile Photo | 320×320 px | 1:1 | 5.00 MB | JPG, PNG |
Frequently Asked Questions
Yes — 100% free, no signup, no watermark, no quota. Everything runs in your browser via the Image and File APIs that ship with every modern browser.
No. The tool uses URL.createObjectURL to read your image locally — your image is never sent to our servers and we never see it. You can verify this by opening the Network tab in DevTools while you inspect an image.
On iPhone, open Photos, tap an image, and swipe up to see dimensions. On Mac, right-click in Finder → Get Info. On Windows, right-click in File Explorer → Properties → Details. The fastest method on any device is to drop the image into this tool — it works in any browser without installing anything.
For the feed, 1080×1080 px (square) or 1080×1350 px (4:5 portrait — the default profile-grid format since January 2025). For Stories and Reels, 1080×1920 px (9:16). The cheatsheet below covers every Instagram surface.
Resolution is how many pixels the image contains (e.g. 1920×1080) — it controls sharpness. File size is how many bytes the image takes up on disk — it depends on resolution, format, and compression. A 4 MB JPG and a 4 MB WebP can have very different resolutions because WebP compresses about 30% better than JPG at equivalent visual quality.
Either the resolution is below the platform's recommendation (so the platform upscales it and adds blur) or the platform recompresses it heavily on upload. Check this tool — if the dimensions or aspect ratio show Fail or Warn for the surface you're posting to, that's why.
Instagram feed: 1:1 or 4:5. Stories/Reels/TikTok/Shorts/Snapchat: 9:16. YouTube thumbnails and Twitter/X in-stream: 16:9. LinkedIn and Facebook posts: 1.91:1. Pinterest pins: 2:3 vertical. The cheatsheet section breaks down every surface.
Most platforms accept JPG and PNG everywhere. Instagram, X, and LinkedIn now also accept WebP. AVIF support is still spotty. HEIC (iPhone default) is silently converted on upload by most apps but may fail on direct uploads — convert to JPG first to avoid surprises. The cheatsheet shows the accepted formats per surface.
Yes — drop several images in at the same time. Each gets its own inspection card and a sortable summary table appears for bulk comparison. You can export the table as CSV with a single click.
Every spec in the cheatsheet has a `lastVerified` field tied to the official platform documentation. We refresh the data every six months — last reviewed April 2026.
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