Guide5 min read
Why Your GIF Stops Looping After Resizing
A GIF that loops fine on its own often plays just once after resizing or converting — here's the real cause and how to fix it for good.
Resize image
Resize to exact dimensions or social media presets. Batch supported. Free and private — nothing is uploaded.
Drop images here, click to browse, or paste
Supports JPG, PNG, WebP, HEIC, GIF — up to 100 MB each
✓Free forever
✓Runs locally
✓No account
✓No watermark
Resizing video instead?
Everything you need to resize images
Social media presets
20+ one-click presets for every major platform — Instagram posts, stories, and profiles; Twitter/X, LinkedIn, Facebook, YouTube, and TikTok. Select a preset and the dimensions are applied instantly.
Batch resize
Drop 10, 20, or 50 images at once. Every file is resized with the same settings and ready to download as a ZIP. No per-image limits, ever.
Three fit modes
Cover crops to fill the target frame from the center. Contain letterboxes your image with a custom background color. Stretch forces exact dimensions when distortion is acceptable.
Format and quality control
Output to JPG, PNG, or WebP. Adjust the quality slider for JPG and WebP to balance file size and visual fidelity. PNG output is always lossless.
Private by design
Your images never leave your device. PixelTools runs entirely in your browser — zero server uploads, zero data stored. Works offline once loaded.
Three steps to perfectly sized images
- 1
Upload your images
Drag and drop one or more images onto the page, click to browse, or paste from your clipboard. Supports JPG, PNG, WebP, and HEIC files up to 100 MB each.
- 2
Set dimensions or pick a preset
Enter exact width and height in pixels, or choose from 20+ social media presets for Instagram, Twitter, LinkedIn, Facebook, YouTube, and TikTok. Select a fit mode: Cover crops to fill, Contain letterboxes, Stretch forces exact dimensions.
- 3
Download your resized images
Click 'Resize' and your images are processed instantly in your browser. Download individually or all at once as a ZIP. Nothing is uploaded to any server — your files stay on your device.
Built for anyone who works with images
Whether you're a social media manager resizing content for every platform, a web developer optimising images for deployment, or a photographer preparing portfolio shots — PixelTools resizes your images in seconds, for free.
Social media managers
Batch resize content for every platform in one session. Pick Instagram, Twitter, LinkedIn, and Facebook presets back-to-back and download all variants as a ZIP.
Web developers
Resize hero images, thumbnails, and Open Graph images to exact pixel dimensions before deployment. Smaller, correctly sized images improve Core Web Vitals and SEO.
Email marketers
Ensure header images and product shots are the exact pixel dimensions your email template expects. No broken layouts from oversized or undersized images.
Ecommerce sellers
Resize product photography in bulk to your platform's required dimensions — Shopify, Etsy, Amazon. Consistent dimensions mean cleaner product listings.
Photographers
Export portfolio images to exact screen-ready dimensions for your website or client delivery. No guessing whether a photo will display correctly.
Content creators
Prepare thumbnails, cover images, and promotional graphics for YouTube, TikTok, and blog posts — all sized to spec with a single drag and drop.
Frequently asked questions
Is PixelTools image resizer free?
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Yes, completely free with no limits. Resize as many images as you want, to any dimensions, as often as you want. No subscription, no trial, no account required.
Are my images uploaded to a server?
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No. PixelTools resizes images entirely in your browser using the Canvas API. Your files never leave your device — there is no server upload, no cloud processing, and no data stored anywhere.
Can I resize multiple images at once?
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Yes. Drop or select as many images as you need — they are all resized with the same settings in batch. Download each file individually or all at once as a ZIP archive.
What is the difference between Contain, Cover, and Stretch?
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Cover scales your image to fill the target dimensions entirely, cropping the excess from the center. Contain fits the entire image inside the target dimensions with no cropping, adding a background fill to the empty space. Stretch forces the image to exactly match the target dimensions, which may distort the image if the aspect ratio differs.
What image formats are supported?
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PixelTools supports JPG, PNG, WebP, and HEIC as input. You can output to JPG, PNG, or WebP. HEIC images from iPhone are automatically converted before resizing.
Can I resize to any custom dimensions?
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Yes. Enter any width and height in pixels from 1 to 9999. You can also use the aspect ratio lock to proportionally scale your image, or pick from the social media presets for common dimensions.
How do I resize an image for Instagram?
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Switch to the Instagram tab in the presets section. Click 'Square' for a 1080×1080 post, 'Portrait' for a 1080×1350 post, 'Story / Reel' for a 1080×1920 story, or 'Profile' for a 320×320 profile photo. The dimensions are applied instantly.
Does resizing reduce image quality?
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For JPG and WebP output, the quality slider lets you control compression. The default 92% quality is near-lossless — virtually indistinguishable from the original. PNG output is always lossless. Resizing itself does not degrade quality beyond what the output format and quality setting dictate.
From the blog
Guide5 min read
Does Resizing a Photo Remove EXIF Data?
Resizing a photo removes GPS/EXIF data in canvas-based tools like ours, but not universally. Here's the real mechanism and how to check.
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Why Your Transparent GIF Turns Black
A transparent GIF background turning black or white after resizing is a palette bug, not damage to your file — here's why it happens and how to fix it.
Editing5 min read
How to Resize a GIF Online (Without Losing the Animation)
Resize an animated GIF to a smaller dimension or file size without flattening it to a single frame. Free, browser-based, no software or upload required.