Free · No account · In-browser
Perfectly sized images
for every platform.
Resize and crop for Instagram, X, LinkedIn, TikTok and more — in seconds, entirely in your browser. No upload, no signup.
Drop an image here
or click to browse your files
JPG · PNG · WebP · HEIC · up to 50 MB
Files never leave your browser
Resizes in under a second
No account needed
Platform presets
Built for every platform.
Every major social format, ready to go. Click any card to start resizing.
Instagram
- Post1080×1080
- Portrait1080×1350
- Story / Reel1080×1920
- Landscape1080×566
X (Twitter)
- Post image1200×675
- Header1500×500
- Profile photo400×400
- Card image800×418
LinkedIn
- Post image1200×627
- Cover photo1584×396
- Article header1200×644
- Profile photo400×400
Facebook
- Post1200×630
- Cover820×312
- Story1080×1920
- Event cover1920×1080
YouTube
- Thumbnail1280×720
- Channel banner2560×1440
- Shorts cover1080×1920
- Community post1080×1080
TikTok
- Video cover1080×1920
- Profile photo200×200
- Landscape1920×1080
- Square1080×1080
Pinterest
- Standard pin1000×1500
- Square pin1000×1000
- Infographic1000×3000
- Story pin1080×1920
Threads
- Post1080×1350
- Square1080×1080
- Landscape1080×566
- Profile photo200×200
What it does
No compromises on quality.
Four features that cover 95% of what social creators actually need.
Custom dimensions
Set any width and height in pixels. Lock the aspect ratio to resize proportionally, or unlock to stretch freely. Presets snap to exact platform specs with one click.
Canvas size
1080
×1350
Format conversion
Convert between PNG, JPG, and WebP without a third-party tool. See the estimated file size before you download — no surprises.
Export as
PNG
JPG
WebP
Estimated size~148 KB
File-size control
Drag a quality slider to hit a target file size. Perfect when an upload form has a strict MB cap — email attachments, submission portals, LinkedIn documents.
Quality
Smaller file72%Higher quality
Target: under 200 KBPrivacy by default
Every resize, crop, and conversion runs on your CPU using the Canvas API. The network tab stays empty. Nothing is sent anywhere.
Open file from disk
Process in browser
Upload to serverBlocked
Three steps
Done in under a minute.
1
Upload
Drop a file or pick from your photos app. JPG, PNG, WebP, HEIC — all accepted.
photo-cafe.jpg
3.2 MB · 4032×3024
2
Resize or crop
Pick a platform preset or enter custom dimensions. Drag handles to frame your shot.
IG Post1080×1080
3
Download
Export as JPG, PNG, or WebP. The file saves directly to your downloads — no cloud.
photo-cafe-1080.jpg
148 KB · ready to post
From the blog
Guides for every platform.
Dimension specs, tips, and deep-dives so your images always look right.
FAQ
Common questions.
Everything you'd want to know before trusting a tool with your images.
Instagram posts display at 1080×1080 px (square), 1080×1350 px (portrait 4:5), or 1080×566 px (landscape). Portrait tends to take more feed real estate and typically sees higher engagement. Stories and Reels are always 1080×1920.
Always resize down, not up — scaling an image larger than its source resolution creates blur. Export as PNG for lossless quality, or WebP at 90%+ quality for a good balance of sharpness and file size. Avoid re-saving JPGs multiple times; each save introduces extra compression loss.
ImageSizeTool is completely free. There's no account, no subscription, and no watermark on your images. No freemium bait-and-switch — just a fast, free tool.
No. Everything runs entirely in your browser using the Canvas API. Your files never leave your device. You can open the browser's network inspector and confirm — there are zero requests related to your image.
You can open JPG, PNG, WebP, and HEIC files up to 50 MB. You can export as JPG, PNG, or WebP. SVG and PDF export are on the roadmap.
Open the editor and select a platform preset — for example, "Instagram Story" locks the crop to 9:16 automatically. Drag the handles to position your subject, then click Download. You can also enter a custom aspect ratio manually.
Single-image resizing is fully supported today. Batch processing — upload 10 images, apply the same preset, download as a zip — is actively in development. It's the most-requested feature and is coming soon.
JPG uses lossy compression, which can soften fine detail and introduce artefacts around text or hard edges. PNG is lossless and preserves every pixel. For posts with text overlaid, PNG or high-quality WebP gives a noticeably sharper result.
WebP gives the best quality-to-file-size ratio and is supported by Instagram, X, LinkedIn, and every modern browser. JPG is universally safe if you're unsure. Use PNG only when you need a transparent background or perfect sharpness on small text.
Yes. The editor is fully responsive and works on iPhone and Android. Tap the upload button, pick a photo from your camera roll, select a preset, and download. The whole flow takes about 15 seconds on a modern phone.