Short-form Preflight Local in your browser

LOCAL PREFLIGHT TOOL

Check your subtitle before you post to Shorts, Reels and TikTok.

Load a local image or video, place your Subtitle, and see if it's clear on all three — nothing leaves your browser.

Try it now with the demo Subtitle
No media selectedExplore the demo, or choose an image or video. Nothing is uploaded.

Preflight summary

Check the Subtitle against all three demo presets.

Now vs. after fix DEMO DATA ONLY
StateShortsReelsTikTok
Now———
After fixNot appliedNot appliedNot applied

Run Auto Position to compare the result. Subtitle size stays the same.

01

YouTube Shorts

Overlap
Try the demo Subtitle.Then choose your own local media.
DEMO REGIONS
Subtitle

Checking demo regions…

02

Instagram Reels

Overlap
Try the demo Subtitle.Then choose your own local media.
DEMO REGIONS
Subtitle

Checking demo regions…

03

TikTok

Overlap
Try the demo Subtitle.Then choose your own local media.
DEMO REGIONS
Subtitle

Checking demo regions…

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9:16 reference frame · Media fits without croppingOne source · Synchronized playback