Ad Platform Specs
Reddit Ads Specs
Reddit is cheap inventory attached to a hostile audience, which is a good trade if the creative respects the context. The specs are simple. The judgement is that an ad which looks like an ad gets downvoted in public, and that comment thread is attached to your campaign.
| Format | Ratio | Recommended pixels | Notes |
|---|---|---|---|
| Image ad | 1:1 or 4:5 | 1200 x 1200 | Feed native, keep text minimal |
| Image ad, landscape | 1.91:1 | 1200 x 628 | Works for link style creative |
| Video ad | 1:1, 4:5 or 16:9 | 1200 x 1200 or higher | Autoplays muted, caption it |
| Carousel | 1:1 | 1200 x 1200 | Multiple cards with their own links |
| Free form text ad | N/A | N/A | Reads closest to a native post |
| Field | Limit | Guidance |
|---|---|---|
| Headline | 300 characters | Under 80 reads best in feed |
| Display URL | Shown as the domain | Match the destination |
| Call to action | From a preset list | Test Learn More against Download |
Notes
Comments are on by default and they are the campaign's most visible risk and its best asset. Leave them open, staff them with someone who knows the product, and answer plainly. A well handled critical thread converts better than a clean ad with no engagement, and a neglected one becomes the ad.
Subreddit targeting beats interest targeting for precision, but the tighter you go the faster you exhaust the audience. I usually run a small set of highly relevant subreddits for efficiency alongside a broader interest layer to keep delivery stable, then rotate creative on the tight set frequently.
Write like a Redditor and disclose that you are the brand. The platform tolerates commercial content that is honest and detests content that pretends to be organic. Plain language, no marketing adjectives, and a specific claim will outperform polished agency copy on this platform specifically.
Reddit's ad manager, format availability and creative specs have changed repeatedly as the platform has built out its ads business. Verify against the Reddit for Business help centre before producing assets.
Frequently asked questions
Should I turn off comments on Reddit ads?
Almost never. Disabling comments signals you expect criticism and removes the engagement that makes the format work. Staff the thread instead.
How does Reddit advertising interact with organic Reddit visibility in Google?
They are separate systems. Ads do not improve organic ranking, but Reddit threads rank well in Google on their own, so a genuinely useful comment presence can be worth more long term than the paid impressions.
Official sources
Platforms change specifications without notice. Check the primary documentation before a launch that depends on an exact value.
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