Loading page
About this tool
Export Threads post images and carousels at native display sizes and check the supported aspect ratio range.
This tool exports Threads post images at the 1080 pixel width the feed serves and checks your shape against the supported aspect range, which runs from 1.91:1 landscape down to 4:5 portrait. Anything outside that range is centre-cropped by Threads, so the tool states exactly what percentage of the frame survives and what the cropped result will be. Carousel planning up to the 20-item limit and PNG, JPEG or WebP encoding all happen in the browser.
Open Threads Image Size Generator on AltFTool — it loads instantly in your browser.
Upload or drag in the file you want to work with.
Adjust the settings and preview the result.
Download the finished file to your device.
Checks your shape against the 1.91:1 to 4:5 window and shows the crop Threads would apply.
Resizes to 1080 pixels wide so the platform re-encode starts from a clean, correctly sized file.
Counts slides against the 20-item ceiling and totals the pixels you are shipping.
1080 pixels wide. Use 1080 x 1350 for portrait, 1080 x 1080 for square and 1080 x 566 for landscape. Threads serves feed images at 1080 wide, so uploading larger only means the server downsamples for you.
From 1.91:1 landscape to 4:5 portrait. A shape outside that window is centre-cropped in the feed — a 9:16 vertical still, for example, keeps only about 70% of its height once Threads trims it to 4:5.
Up to 20 media items in a single post. Keeping every slide the same aspect ratio matters more than the count, because a mixed carousel makes the feed frame resize as the reader swipes.
Effectively yes — Threads uses the same 1080 pixel serving width and the same 1.91:1 to 4:5 supported range as the Instagram feed, so one export set covers both. Stories and Reels are a separate 9:16 canvas at 1080 x 1920.