Mass Delete Reddit Posts and Comments by Karma Score

Everything at or below the number you enter, inclusive. A ceiling of 10 clears every post or comment scoring 10 karma or less and leaves anything above it. Enter 0 to catch only the zero-and-negative pile, or a higher number to sweep up the barely-noticed too. The filter never counts upward, so your best-scoring content is out of range no matter what you type.

No, they're independent. Each content type gets its own maximum on its own tab, so you can prune your comments aggressively and leave your posts alone entirely, or the reverse.

The karma filter works as a ceiling: it only removes content at or below the score you choose, so your higher-scoring posts stay out of range. To shield specific content regardless of its score, add its subreddit to the preserve list.

Yes. The Engagement Filter is available on every plan and reaches your whole history. Free accounts anonymize the matches with the Edit action, while permanently deleting them needs a paid plan, as does scheduling a recurring karma sweep.

No. Reddit keeps the karma you earned or lost even after the content is gone, so your total doesn't move. What changes is what people can see and sort through on your profile, not the number itself.

Yes, and that's exactly the surgical run this filter is built for. A karma ceiling plus a date range plus a subreddit lets you clear, for example, only last year's downvoted comments from one community.