Fix Broken Links and Media Before You Schedule: 6 Checks

Check six things before a post goes into the schedule: the link, the preview, the media file, the caption length, the account connection and the time. It takes under a minute per post, and it catches nearly every failure that otherwise shows up live. Do it at the moment of scheduling, not the morning of publishing.

TLDR: Open the link on a phone, check the preview image, confirm file size and format, count the caption against the platform limit, confirm the account is connected, and read the publish time in the audience's time zone.

Mydrop data, September 2026: in the 30 days to 16 September 2026, 98.5% of posts published through Mydrop went live at the first attempt. The most common warning was a YouTube custom thumbnail rejected because the channel was not phone-verified; the most common hard failure was an expired platform connection. Method in the Mydrop social media benchmarks.

Why the check belongs before scheduling

A post you schedule on Monday for Friday breaks in silence. Nobody is looking at it, so a dead link can sit live for hours. Checking at the moment of scheduling puts the fix next to the person who wrote the post and still remembers where the file is.

The numbers above show most posts go out fine, so the checklist is about the small share that do not, and about the warnings that quietly cost you reach.

The six checks

#	Check	How	Common failure
1	Link	Tap it on a phone, in a private window	Typo, expired page, tracking tag that breaks the URL
2	Preview	Look at the image and title the platform will show	Old image cached, wrong crop
3	Media file	Check size, format and ratio against the platform	Too large, wrong ratio, unsupported format
4	Caption	Count characters; check hashtags	Over the platform limit
5	Account	Confirm the connection is active	Expired login or permission
6	Time	Read it in the audience's local time	Scheduled in your zone, not theirs

Run the list in order. The first two are the ones that embarrass people.

Check the link as a visitor would

Do not click the link in your scheduling tool. Copy it, open a private window on your phone, and watch the page load. You are testing the real experience: speed, redirects and whether the page matches the promise in the caption.

If you add tracking tags, test the tagged version. A tag appended with the wrong separator is a classic way to break a working page.

Check the preview image

Link previews are built from the destination page's metadata, and platforms cache them. If you changed the image on the page after the first share, the old one may still show. Where the platform lets you upload a custom image for the post, do that instead of relying on the page.

Mydrop's post preview shows how each platform will render the post before you schedule, so you can see the crop and the first lines of the caption on every channel instead of finding out live.

Know the limits before the platform does

A scheduler enforces caps that the app does not always show you while you type. Mydrop's publisher checks these before sending: TikTok 2,200 characters with hashtags counted inside the caption, X 280 weighted characters, Bluesky 300 characters, and Pinterest alt text at 500 characters. Instagram's own API rejects captions over 2,200 characters, and Instagram caps posts and Reels at 5 hashtags.

If you write one caption for several platforms, copy it into the shortest limit first, then expand for the others.

Fix the one that is not about the post

Mydrop's data names the most common hard failure: an expired platform connection. No amount of careful checking helps if the account has been disconnected. Once a week, open your connected accounts and reconnect anything flagged. The most common warning was a YouTube custom thumbnail rejected because the channel was not phone-verified, so verify the channel before your first video.

Make someone else the second pair of eyes

A person who did not write the post sees what the author misses. For anything with a link, a price or a claim, add a reviewer. In Mydrop, approvals put a named reviewer on each post, and the reviewer can leave comments on the draft, so the check lives with the post rather than in a chat.

What to do when a post still fails

1. Open the failed post and read the exact error.
2. Fix the cause (file, caption or connection).
3. Reschedule for the next sensible time, not immediately.
4. Add the cause to your checklist so it is caught next time.

Keep a running list of failures for a month. Three of the same cause is a new row in your table.

Your next step: paste the six checks into your scheduling notes, and run them on every post you schedule this week. Count how many fixes you make. That number is what the checklist is saving you.