Reddit Caption Optimizer

How Reddit is different from every other platform

Nothing here is algorithmic in the way the other feeds are. A post is shown to a subreddit, it collects early votes, and the vote velocity decides whether it climbs. That means the first ten minutes and the first ten voters matter more than anything you can optimise afterwards.

Every subreddit is its own country, with its own rules, tone, and tolerance for self-promotion. The same title that is welcome in one is removed in another. Read the sidebar and the last twenty posts before you write anything — that is the highest-return step in the process, and no tool can do it for you.

Reddit readers are the most marketing-allergic audience on the internet and they are very good at spotting a pitch. Honest framing — including saying plainly that you built the thing — consistently outperforms trying to disguise it.

Titles, bodies, and flair

Titles are capped at 300 characters and the useful range is 60 to 100. Be specific and literal: "Our Postgres bill went from $4k to $600 — here's what we changed" beats "An interesting lesson about database costs". Curiosity gaps are treated as clickbait and punished with downvotes.

The body can run to tens of thousands of characters, and long is fine on Reddit in a way it is nowhere else — but it has to be substance. Include the numbers, the failures, and the caveats. Formatting matters: short paragraphs, real markdown headings, no walls of text.

Use the flair the subreddit expects. Missing or wrong flair is one of the most common reasons a perfectly good post is auto-removed.

Do not use hashtags. They do nothing on Reddit and immediately mark the post as cross-posted from somewhere else.

Common Reddit mistakes

Posting the same title to five subreddits. It reads as spam to users and to Reddit's own filters, and moderators of related subs often notice.

Leading with a link and no context. Most subreddits require a comment explaining the link, and posts without one get removed.

Answering criticism defensively. The comment thread is where Reddit posts are won; conceding a fair point earns more goodwill than any title optimisation.

Ignoring the ratio rule. Many communities expect a substantial history of ordinary participation before you post anything of your own.