PublishPixel
Free Smart Image Publish Check Tool
Check if your image is ready for websites, SEO, social media, YouTube thumbnails, e-commerce, email headers, and more — privately in your browser.
- Browser-based analysis
- No signup required
- Free image utility
- Privacy-first workflow
Free browser tool
Smart Image Publish Check
Upload an image and get a practical readiness score for websites, SEO, social platforms, thumbnails, product images and more.
Drop your image here or choose a file
Supports JPG, PNG, WebP, static GIF and basic SVG. Recommended visual limit: up to 15 MB.
Privacy-first: your image is analyzed locally in your browser.
Scores are estimated from common platform guidelines and practical publishing heuristics.
What the tool checks
What does PublishPixel check?
Image readiness is more than a file size number. The Smart Check combines dimensions, ratio, format, estimated compression and context so you can make a better publishing decision before an image goes live.
Publishing speed
Why image readiness matters
Images influence page speed, visual polish, social previews and the first impression of a post or product. A very large image can slow a page down, while a small or wrongly cropped image can look weak in previews. This tool helps you catch common issues early.
Recommendations are intentionally practical: resize for the channel, convert when it may reduce weight, compress carefully and avoid making claims about visual content the tool cannot inspect.
How scoring works
Smart Image Publish Check explained
The PublishReady Score weighs dimensions and aspect ratio, file size, recommended format and context-specific quality signals. It is designed to guide fast decisions, not to replace official platform requirements.
Popular presets
Popular image presets
Website / Blog Image
1200-1600 px wide; recommended ratio Flexible, commonly 16:9, 4:3 or square.
SEO Featured Image
1200 px wide or larger; recommended ratio 16:9 or 4:3.
Open Graph Image
1200 x 630 px; recommended ratio 1.91:1.
Google Discover Image
1200 px wide or larger; recommended ratio 16:9.
YouTube Thumbnail
1280 x 720 px; recommended ratio 16:9.
Instagram Post
1080 x 1080, 1080 x 1350 or 1080 x 566 px; recommended ratio 1:1, 4:5 or 1.91:1.
Instagram Story
1080 x 1920 px; recommended ratio 9:16.
Facebook Post
1200 x 630 px; recommended ratio 1.91:1.
LinkedIn Post
1200 x 627 px; recommended ratio About 1.91:1.
Pinterest Pin
1000 x 1500 px; recommended ratio 2:3.
E-commerce Product Image
1000 x 1000 px or larger; recommended ratio 1:1 square.
Favicon
Square; export 16, 32, 48, 180 and 512 px variants; recommended ratio 1:1 square.
Privacy-first image analysis
Your image stays in your browser
PublishPixel does not upload your image to a server for analysis. Browser APIs read the file, calculate dimensions and create optional exported versions locally. Preferences such as theme, preset and consent may use localStorage; images are not stored.
Who is this for?
FAQ
Common questions
Does PublishPixel upload my image?
No. The main analysis runs locally in your browser with File API, Canvas API and native image decoding where available.
Is the PublishReady Score an official platform score?
No. It is an estimated score based on common publishing guidelines, file size targets, dimensions, aspect ratio and practical quality heuristics.
Can I use this for Open Graph images?
Yes. Choose the Open Graph preset to check the common 1200 x 630 pixel format, file size and format recommendations.
Can the tool compress images?
Yes. After uploading a supported raster image, you can export an optimized JPG, WebP or PNG preview from your browser.
Does resizing improve image quality?
Resizing can fit a publishing target, but upscaling a small image may not recover lost detail. The tool warns when the source looks too small.
Does the tool remove EXIF metadata?
Re-exporting through Canvas normally removes EXIF metadata, but behavior can vary by browser and format, so this should not be treated as a perfect metadata removal guarantee.
Which formats are supported?
The initial version supports JPG, JPEG, PNG, WebP, static GIF checks and basic SVG dimension analysis.
Can I use this for YouTube thumbnails?
Yes. The YouTube preset checks the common 1280 x 720 pixel size, 16:9 ratio and file size recommendations.
Is this tool free?
Yes. The app is designed as a free browser-based utility. AdSense placeholders are prepared but no fake ads are shown.
Should I verify official requirements?
Yes. Platform requirements can change, so verify official documentation when the image is critical for a campaign, upload or launch.