Context-aware checks
Compare your image against practical presets for blogs, Open Graph previews, YouTube thumbnails, product images, email headers and social posts.
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.
Social Media Image Sizes Guide
Find the recommended image dimensions for every major social platform.
Website Image Optimizer
Compress, resize, and prepare website images before publishing.
Smart Image Publish Check
Check whether your image is ready before publishing.
Compress Image Online
Reduce image file size before publishing to websites, blogs and social platforms.
Resize Image Online
Export practical dimensions for web layouts, thumbnails and social media crops.
EXIF Data Viewer
Check image metadata and privacy signals before sharing photos online.
- 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.
Optional accessibility check. PublishPixel does not invent visual descriptions.
Choose a preset, upload an image and the results will appear here with score, warnings, practical recommendations and export tools.
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.
Dimensions, aspect ratio and orientation
Estimated file size and compression opportunity
Format suitability for the selected publishing context
SEO filename and alt text structure guidance
Open Graph and social compatibility signals
Warnings for heavy, small or mismatched images
Why PublishPixel is different
More than compression: a complete image publishing check
Most image tools focus on one action: compress, resize or convert. PublishPixel combines those steps with publishing context so you can decide whether an image is actually ready for the place it will appear.
Publishing copy workflow
Keep your original file safe and export a dedicated version for the channel where the image will be published.
Practical readiness score
Get a simple score with clear warnings for size, dimensions, ratio, format, alt text, filename quality and metadata awareness.
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.
Pre-publish workflow
A practical pre-publish workflow for images
Many image tools focus only on compression or conversion. PublishPixel combines multiple publishing checks in one workflow so you can review the image before it reaches your CMS, store, campaign page or social post.
Before uploading
Check dimensions, ratio, weight and format before the file enters your publishing system.
Before sharing
Prepare Open Graph, thumbnail and social crops so previews look intentional.
Before archiving
Export a publishing copy instead of using the original file when privacy, metadata or size matters.
Accessibility checklist
Prepare images that more people can understand
Publishing readiness includes more than pixels. A useful image should have a purpose, a readable crop and an alt text plan that describes the visible content honestly. If an image is decorative, the final page should treat it that way instead of forcing noisy alt text.
PublishPixel gives filename and alt text structure guidance without inventing a visual description. You stay in control of the final wording because you know the image and page context best.
Performance checklist
Catch heavy files before they slow a page
Large images can make a good page feel slow. Before publishing, check whether the file is larger than the destination needs, whether the dimensions match the layout and whether WebP or JPG would be a better export format.
The browser-based export tools help create lighter previews for common workflows. They are useful for preparation, while production sites should still use responsive image markup and caching.
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.
40% dimensions and aspect ratio
25% file size
20% recommended format
15% context and quality heuristics
Related guides
Learn the image publishing checklist
These original guides explain the decisions behind the checker: image dimensions, metadata, alt text, compression, privacy and format choice.
Image Size for Web: Practical Dimensions Before Publishing
Learn how to choose web image dimensions that look sharp without slowing down your pages.
How to Remove Image Metadata Before Publishing
Understand EXIF metadata, privacy risks and safer ways to publish images online.
How to Write Useful Image Alt Text
Write clearer alt text for accessibility, context and better image publishing workflows.
WebP vs JPEG vs PNG: Which Image Format Should You Use?
Compare common image formats and choose a practical publishing format for web pages and social previews.
Image SEO Checklist Before Publishing
A practical checklist for filenames, alt text, dimensions, file size and social previews.
Social Media Image Sizes: A Practical Publishing Guide
Prepare image crops for Open Graph, YouTube thumbnails, Instagram, LinkedIn, Pinterest and product feeds.
How to Compress Images Without Losing Too Much Quality
Reduce image weight while keeping photos and graphics clear enough for publishing.
Photo Privacy Checklist Before Publishing Online
Review metadata, visible details, permissions and sensitive context before publishing photos.
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?
Bloggers
SEO professionals
YouTubers
E-commerce sellers
Social media creators
Designers
Students
Small businesses
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 support is prepared, but ads are not shown unless an approved publisher client is configured.
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.
Accuracy disclaimer: Results are estimates based on common platform patterns and technical checks available in the browser. Platform requirements can change, and this tool does not guarantee SEO ranking, approval or final rendering on any third-party service.