A video can look sharp in your editor and still come out soft, cropped, or oddly framed after upload. That usually means the export size was wrong for the platform. If you want the best social media export sizes, start by matching the file to the way each app actually displays content, not just the way it looked on your screen.
This is where people lose quality without realizing it. They upload one master file everywhere, let each platform resize it, and end up with blurrier text, awkward crops, or black bars. A better approach is simple: pick the destination first, preview the framing, then export at the right dimensions.
Best social media export sizes by platform
The safest rule is to export for the native layout the platform prefers. That reduces surprise cropping and helps your post look more intentional.
For Reels and Stories, 1080 x 1920 is the standard choice. That is a full-screen vertical 9:16 frame, and it is still the best default for most creator and business content.
For feed posts, it depends on the look you want. Square posts at 1080 x 1080 still work well, especially for product shots, quote graphics, and simple carousels. Portrait feed posts at 1080 x 1350 usually take up more screen space, which can help them stand out a bit more in the feed. Landscape posts are less common and can feel smaller on mobile, but 1080 x 566 is a workable option when horizontal framing matters.
If your source footage is horizontal and the important action sits near the edges, forcing it into 9:16 can create awkward crops. In that case, it is often better to reframe carefully or create a separate version instead of stretching one export across every placement.
TikTok
TikTok is straightforward. Export at 1080 x 1920 for vertical videos. If your clip was recorded on a phone, that is usually the cleanest fit.
The challenge is not the size itself but safe framing. TikTok overlays interface elements on top of the video, so captions, logos, and key visuals should stay away from the extreme top and bottom. A technically correct size can still feel wrong if your text gets covered by buttons or the caption area.
YouTube Shorts and standard YouTube
YouTube Shorts also favors 1080 x 1920. If you are making short-form content for multiple platforms, one good 9:16 export can often cover Shorts, TikTok, and Instagram Reels.
Standard YouTube video is different. Use 1920 x 1080 for the usual horizontal format. This matters if you are repurposing clips from a longer video. A full-length tutorial, product demo, or interview usually looks more natural in 16:9, while the short teaser version should be cut and exported separately for vertical viewing.
Facebook supports a mix of formats, but 1080 x 1350 is a strong default for feed video and images because it uses more vertical screen space without going full-screen. For Reels, use 1080 x 1920.
If you are posting older horizontal business videos, 1920 x 1080 still works. Just expect that a vertical or near-vertical format often gets more visual presence on mobile.
LinkedIn is a little more conservative visually, but the same practical rule applies. For feed posts, 1080 x 1350 or 1080 x 1080 usually works well. If you are sharing talking-head clips, company updates, or event snippets, those sizes feel natural in the feed.
For more polished business video, 1920 x 1080 remains a solid choice. It depends on the context. A formal webinar preview or product walkthrough may benefit from a horizontal frame, while a short mobile-first tip often performs better in portrait.
X
X supports several layouts, but 1080 x 1350 and 1080 x 1080 are both practical choices for image posts. For video, square, portrait, and landscape can all work depending on the asset.
If you want the least friction, use 1080 x 1080 for simple graphics and 1080 x 1350 when you want more height in the feed. For video clips that were originally shot horizontal, 1920 x 1080 is still reasonable. Just know that mobile viewers often engage more easily with taller framing.
Why the best social media export sizes still depend on the content
There is no single magic export size for every post. The platform matters, but so does the media itself.
A product close-up, selfie-style explainer, or behind-the-scenes clip usually adapts well to vertical formats. A screen recording, slideshow, gameplay clip, or wide group shot often suffers when cropped too aggressively. If the video depends on edge detail, using a taller format can make the result feel cramped.
That is why a quick preview step matters. Upload the file, test the crop, and check whether faces, text, and focal points still sit comfortably in frame. If they do not, export a second version instead of pushing one file into every placement.
Resolution is only part of export quality
People often focus on dimensions and ignore the rest of the export settings. Size gets the framing right, but clarity also depends on source quality, compression, and cleanup before export.
If your footage is noisy, soft, flickery, or heavily compressed, the correct dimensions alone will not fix it. Social platforms compress again after upload, and that tends to punish already weak files. A rough clip exported at the perfect size can still look rough.
A more reliable workflow is upload, clean up what is actually hurting the image, preview the result, then export in the platform format you need. For video, that might mean using denoise to reduce grain, artifact cleanup for compression damage, stabilization for shaky clips, or color recovery when phone footage looks flat. If the issue is unclear, auto-detect fixes can give you a reasonable starting point before you fine-tune.
That is especially useful for short social videos because every flaw becomes more obvious when the frame is small and mobile-first. Text edges, skin detail, and product surfaces all suffer fast when the source is messy.
A practical export workflow that saves time
The fastest way to get consistent results is not to memorize every platform spec. It is to build one repeatable process.
Start with the best source file you have. If the clip is blurry, noisy, interlaced-looking, or full of compression blocks, clean that up first. Then decide where the post is going. If it is a Reel, Story, TikTok, or Short, frame for 1080 x 1920. If it is a feed post, decide whether square, portrait, or horizontal actually fits the content.
Next, preview before export. Check text placement, headroom, edges, and any on-screen graphics. This is where most preventable mistakes show up. If the subject feels too tight or key details get cropped, adjust now rather than after upload.
Then export the platform-ready version instead of a generic master file. For everyday users, creators, and small businesses, this is usually faster than fixing bad crops later. In a browser-based workflow like MikeSullyTools, that upload to preview to export cycle is the real time-saver. You see the result before committing, and you can keep the process simple or use advanced controls if a specific clip needs more attention.
Common mistakes that make exports look worse
The biggest mistake is upscaling a weak file too aggressively and expecting it to become truly high-detail. Upscaling can help presentation and make a file fit platform dimensions better, but it cannot invent perfect detail that was never captured. Realistic expectations matter.
Another mistake is exporting horizontal footage as vertical without reframing. That often cuts off hands, products, subtitles, or background context that the original shot needed. The third common issue is stacking compression on top of compression by editing downloaded clips that were already heavily reduced.
If you are working with low-quality source media, small improvements add up. Clean up noise, reduce visible artifacts, stabilize motion if needed, preview the crop, and export to the right size. That usually produces a more believable improvement than trying to force a dramatic fix at the end.
Best export sizes to keep on hand
If you only want a small set of go-to dimensions, keep these ready: 1080 x 1920 for vertical short-form video, 1080 x 1350 for portrait feed posts, 1080 x 1080 for square posts, and 1920 x 1080 for standard horizontal video. Those four cover most everyday social publishing needs.
That said, the best social media export sizes are the ones that fit both the platform and the content. Start with the destination, preview the frame, and export with purpose. A clean, properly sized file almost always beats a one-size-fits-all upload.