How to Block Spoilers on Reddit (2026 Guide)

To block spoilers on Reddit in 2026, install Ultimate Reddit Filter and combine three layers: a generic spoiler keyword preset, flair-based filtering (for subreddits that use a "Spoiler" flair), and subreddit blocks for the specific shows, games, or films you're avoiding. Spoiler blocking requires more ongoing curation than topic blocking — this guide explains the most efficient approach.

Last verified: May 25, 2026 · Reading time: 5 min · Difficulty: Medium

TL;DR

• Spoilers can’t be blocked with a single static keyword list — they require per-content curation.
• Three-layer approach: generic keywords + flair filtering + subreddit blocks.
• Best tool: Ultimate Reddit Filter — the only free extension that filters by keyword, flair, AND subreddit simultaneously.
• Difficulty is medium because you’ll need to update keyword lists as you move between shows/games.

Why spoiler blocking is harder than topic blocking

Political posts use consistent vocabulary. Spoiler posts use specific vocabulary — character names, episode numbers, plot events — that changes with every piece of content you’re avoiding. “Block all crypto” is one preset. “Block all Severance season 3 spoilers” requires knowing the character names, the episode titles, and the keywords Reddit users tend to use when discussing that specific show.

The good news: the three-layer approach below handles this systematically.

The setup

1. Install Ultimate Reddit Filter

Free, Chrome + Firefox. Chrome Web Store · Firefox Add-ons.

2. Layer 1 — Generic spoiler keywords

Extension icon → Keywords tab → paste:

spoiler
spoilers
just finished
just watched
just read
ending explained
finale
season finale
post-finale
mid-season finale
episode discussion
episode recap
this week's episode
did anyone else
am i the only one who
i can't believe
that ending
that twist

These catch the discussion framing that spoiler posts use, regardless of content.

3. Layer 2 — Content-specific keywords

For each piece of content you’re avoiding, add the specific markers:

Template — fill in for your content:

[show/game name]
[main character names]
[episode name if known]
season [X]
[villain name]
[plot event keywords]

Example — avoiding a currently-airing show:

[show name]
[character 1]
[character 2]
episode [number]
s[X]e[Y]

Add these to the same Keywords tab. Update as you finish each season or game.

4. Layer 3 — Flair filtering

Many subreddits use a dedicated “Spoiler” flair. Ultimate Reddit Filter handles this in the Flairs tab.

Flairs tab → add:

Spoiler
spoiler
SPOILER
Spoilers
Discussion
Episode Discussion
Season Finale

This catches properly-tagged spoiler posts even if the title text is vague (e.g. “OMG that ending 😱” tagged with the Spoiler flair).

5. Subreddit blocks for unavoidable subs

The most reliable approach for specific content: block the dedicated subreddit until you’re caught up.

Subreddits tab → add the relevant community:

r/[ShowName]
r/[GameName]
r/[FilmFranchise]

Example: blocking all Game of Thrones spoilers → r/gameofthrones, r/asoiaf.

When you’ve caught up, remove the subreddit block.

6. Turn on comment filtering

Settings → Filter comments too. Comments under an innocuous post title are the most common spoiler vector — someone replies with the entire plot.

7. Reload and scan

Browse r/all. If content from the target show/game still appears, note which keyword was missing and add it.

The flair-only shortcut

If you subscribe to a show-specific subreddit and it consistently uses a “Spoiler” or “Episode Discussion” flair, you can skip keyword filtering and just block those flairs. This is cleaner while you’re actively watching and want to stay in the community for non-spoiler discussion.

Going nuclear

If a piece of content is high-stakes (season finale of a show you love, new game with story you care about), block the subreddit entirely until you’re caught up. Don’t rely on keyword filters alone for high-risk content — keyword matching isn’t 100%, and one slip costs the experience.

What this won’t do

• Won’t block spoilers in image or video posts where the spoiler is in the image/thumbnail but not the title. Subreddit blocks are the only reliable protection here.
• Won’t block spoilers in push notifications if you subscribe to communities. Turn off notifications for the relevant subreddits.
• Won’t work on the Reddit mobile app. Use Kiwi or Yandex (Android) or Orion (iOS) for mobile spoiler filtering.
• Won’t catch vague titles like “wow” or ”😱” without content-specific keywords. Flair filtering helps here.

If it’s not working

• Spoiler slipped through? The post title was probably vague — “You won’t believe this ending.” Add more generic framing patterns to the keyword list (that ending, that twist, episode [X] discussion).
• Comment spoiled you? Re-check that “Filter comments too” is on.
• Flair filtering not working? The flair name must match exactly (case-sensitive in some versions). Check the actual flair text used by the subreddit before adding it.

Related guides

• How to filter Reddit: complete 2026 guide — covers flair filtering in depth.
• Reddit keyword blacklist: complete guide — the master preset reference.
• Best Reddit keyword filter extensions 2026 — tool comparison including RES (which also has flair filtering).
• How to hide AITA posts on Reddit — if drama posts are the broader problem.

What to do next

Install Ultimate Reddit Filter, set up the three layers above, then tailor Layer 2 for whatever you’re currently avoiding. Ten minutes of setup for an indefinitely spoiler-resistant feed.

Want the FeedCutter spoiler preset templates in a structured CSV? Join the waitlist.