Platform-perfect sizes for Instagram, Facebook, X, YouTube and more. Every tool below runs locally in your browser — batch, free, no signup, no watermarks.
Every platform rescales uploads with its own server-side scaler — and they are all mediocre. Pre-sizing is the only way to control what your audience actually sees, and this category has a tool for each destination: Instagram Resizer with post, story and profile presets, Facebook Resizer, Twitter/X Resizer, YouTube Thumbnail Resizer, plus LinkedIn and Pinterest for the professional networks. The general Image Resizer handles exact pixels and percentages for everything else.
The presets encode real platform numbers — 1080×1350 portrait, 1080×1920 stories, 1280×720 thumbnails — and aspect-lock with smart cropping means nothing arrives stretched. Batch mode applies one target across a whole campaign so content stays visually consistent. Downscale where possible; enlarge conservatively (the AI upscaler first for 2×+ jobs), then finish with the compressors for portals that also cap file size.
See all 88 tools or the blog guides.