Free Threads Image Cropper. Resize for Vertical, Portrait, and Square Post.
Crop any image to a Threads vertical, portrait, or square post. Cropping happens entirely in your browser - no upload, no signup.
Presets: 1080×1920 (Vertical Post), 1080×1350 (Portrait Post), 1080×1080 (Square Post)
Your image is processed in your browser. We never see, upload, or store it. No signup required.
Drag and drop an image here, or click to browse.
JPEG, PNG, WebP, or GIF · Max 20 MB
Just cropped your image? Schedule it across Threads and 10 other networks with PostFast in 30 seconds.
Start free trialLooking for the full Threads image size guide? See our reference at /sizes/threads.
View Threads sizes →Threads Cropper FAQ
What size should a Threads post image be?
Threads recommends 9:16 vertical (1080×1920) for the best mobile feed experience. 4:5 portrait (1080×1350) also works well for mixed media. Square 1:1 is supported but uses less feed space.
How many images can I add to a Threads post?
You can add up to 10 images or videos per post, displayed as a swipeable carousel. Some users have access to up to 20 items. Use a consistent aspect ratio across the set so the carousel reads cleanly.
Does Threads compress images after upload?
Yes. Like Instagram, Threads applies compression. Cropping at the exact recommended dimensions before upload preserves the most quality through that compression.
Should I export as PNG or JPG for Threads?
JPG for photographs, PNG for graphics with text or transparency. Threads supports both up to 100 MB per file.
Is my image uploaded when I crop?
No. The cropper runs entirely in your browser via the Canvas API. Your image never leaves your device. Verify in DevTools - zero network requests during the crop flow.
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