GlisioFree tools
Free browser video tools
Convert, compress, trim, and plan exports without uploading a file. Processing stays in your browser.
YouTube thumbnail size
Exact YouTube thumbnail size is 1280x720. Also get channel banner, Shorts, and icon pixel sizes. Copy dimensions instantly. Free, no signup.
Free MP4 to GIF converter
Convert MP4 or other video to GIF in your browser. Pick a clip range, choose quality, and download. Files never leave your device. Free, no watermark.
Free in-browser video compressor
Compress MP4 videos in your browser. Compare before/after file size and download a smaller file. Your video never leaves your device.
Free video trimmer
Trim video start and end times in your browser with a simple preview. Download the cut clip privately. No upload, no watermark.
16:9 aspect ratio calculator
Free 16:9 aspect ratio calculator. Enter width or height to get the matching 16x9, 9:16, or 1:1 size for YouTube, TikTok, Reels, and demos. Instant preview.
Video file size estimator
Estimate video file size from resolution, duration, and quality. Plan storage and uploads before you export. Free calculator, no signup.