TikTok Video Size Guide (2025) – Best Resolution & Aspect Ratio

If your TikTok videos appear blurry, stretched, or cropped unexpectedly, the primary cause is using the wrong video size or aspect ratio. TikTok has strict format requirements to ensure quality and consistency, especially for mobile-first content.

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1. Supported Video Formats on TikTok

• Formats: MP4, MOV (H.264)
• Max file size: iOS ≤ 500MB, Android ≤ 200MB
• Video duration: 3 seconds – 30 minutes

2. Recommended TikTok Video Sizes (2025)

2.1 Best TikTok size: 9:16 Vertical

• 1080 × 1920 px (recommended)
• 720 × 1280 px (minimum)
• 1440 × 2560 px (maximum)

This aspect ratio fills the entire smartphone screen and offers the best user engagement.

2.2 Square and 4:5 TikTok video sizes

• 1:1 – 1080 × 1080 px
• 4:5 – 1080 × 1350 px

2.3 Landscape 16:9 TikTok size

• 1920 × 1080 px
• 1280 × 720 px

Suitable for gaming videos, reactions, and repurposed YouTube clips.

2.4 TikTok Ads video size

• In-Feed Ads: 1080 × 1920 px
• Spark Ads: same as original video
• TopView Ads: 1080 × 1920 px

3. How to Fix “Unsupported Video Format” on TikTok

1. Convert the video to MP4 or MOV.
2. Use correct codecs: H.264 (video) and AAC (audio).
3. Adjust the canvas to 9:16 ratio.

You can optimize your video using free tools like: Video Converter – Free Online Tool.

4. Final Thoughts

Using the proper TikTok video size helps improve clarity, retention, and algorithm ranking. The 9:16 format remains the most effective choice for all TikTok content in 2025.