Find the subreddits eating your Reddit ad budget.
Upload your Reddit Ads report and get a call on every subreddit: cut it, spend more, or keep testing. It weighs small samples fairly, so four unlucky clicks don't get a good community killed.
Your file is read in this tab and never uploaded. No signup.
Last 30 days, target $80 per sale
| Subreddit | Clicks | Dashboard | |
|---|---|---|---|
| r/SaaS | 1,000 | $300 | cut. ~$1,020 over |
| r/startups | 300 | $30 | spend more |
| r/Entrepreneur | 4 | ∞ | 4 clicks. wait |
| r/sidehustle | 210 | $145 | too early |
Turn this into a plan
Get a short action plan and subreddits to test next. This sends the subreddit names and numbers above (not your file) to our server and DeepSeek's API. 3 free plans every 30 days, then credits.
This is what Reddit Ads shows you.
Spend divided by conversions, one subreddit at a time. It looks precise. r/Entrepreneur is infinitely expensive, r/Bookkeeping is a star, r/SaaS is a disaster.
Some of those numbers are four clicks old.
Zero sales from four clicks happens all the time, even in a community that converts well. The dashboard can't tell a bad subreddit from an unlucky one, so it prints the scariest possible number.
So weigh each subreddit against your whole account.
Subreddits with little data get pulled toward how your account converts overall. Subreddits with lots of data barely move. The bars show where the real cost per conversion probably sits.
Then the calls are easy.
Cut only when a subreddit is at least 90% likely to cost more than your target. Spend more when it's 90% likely to cost less. Everything else keeps running until the data says something.
Get the report out of Reddit Ads Manager
Takes about a minute. You need conversion tracking (the Reddit Pixel or Conversions API) switched on.
- Open Reporting in Reddit Ads Manager and pick a date range. 30 days or more works best.
- Break the report down by Community. Under placement, choose subreddit.
- Under Metrics, make sure Spend, Clicks and Conversions are showing.
- Click Export, then drop the CSV into the box at the top of this page.
Reddit reports detailed per-subreddit numbers only for ad groups that target specific communities. Interest-targeted and Max campaigns show subreddit delivery in aggregate.
No report handy? Use the 2.3× rule.
If a subreddit has spent 2.3 times your target cost per conversion and hasn't produced a single conversion, cut it. At that point there's less than a 10% chance it's actually hitting your target. Before that, a zero is mostly noise.
Questions people ask
How do I know if a subreddit is wasting my budget?
Compare its cost per conversion with your target, but only once it has enough data. A subreddit that has spent about 2.3 times your target without a conversion can be cut with 90% confidence. With less spend than that, a zero is usually bad luck. The audit goes further by using your other subreddits as evidence, so it can often decide sooner.
Do you upload or store my Reddit Ads data?
No. The CSV is read and analysed inside your browser tab, there's no account, and closing the tab clears it. The audit itself never leaves your browser. Only if you click Write my plan are the subreddit names and numbers from the results (not the file) sent to our server and DeepSeek's API. Identical requests are answered from a cache for 30 days. Details.
Does the plan change the audit's verdicts?
No. Cut, spend more and keep testing come from the statistics, not the language model. The plan explains those calls in plain English and suggests communities to test next. Check each suggested subreddit yourself before spending on it.
Why does this disagree with the Reddit Ads dashboard?
The dashboard judges each subreddit alone. Four clicks and no sale shows as an infinite cost. The audit weighs each subreddit against how your whole account converts, so small samples get pulled toward your average and large samples speak for themselves. The full method is here.
What does "keep testing" mean?
There isn't enough data to say whether the subreddit beats your target. Leave it running, or cap its budget, and check again next week.
Does it work for interest-targeted or Max campaigns?
Partly. Reddit only reports detailed per-subreddit numbers for ad groups that target specific communities. For interest and Max campaigns the subreddit numbers are aggregated, so there's less to work with.
Who built this?
An independent data scientist who got tired of watching people kill good subreddits over four clicks. It's free while it's being tested with real accounts.