Save YouTube channels and videos into niches, find outliers and similar channels, track competitors and test thumbnails.
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#375K
#281K among extensions
Version
1.9.23
updated 13 Oct 2026
About Channel Saver
Channel Saver is a YouTube research toolkit that works right inside YouTube.
FIND NICHES THAT WORK
• Niche Finder: outlier channels, niches with rising competition, viral videos on small channels, trending keywords and popular categories — for the last 24 hours, 7, 30 or 90 days, checked live on YouTube.
• Outlier score on videos: see how many times better a video did than that channel's usual video.
• Filter any YouTube page by outlier score, views, channel size, upload date or Shorts / long videos.
• Similar channels: 20–40 channels like any channel, with similarity, average views, age and upload rate.
SAVE AND ORGANISE
• A "Save" button next to Subscribe: save a channel or a video into your own niches in one click.
• My Library: all saved channels with growth, outlier videos, upload rate, channel age, notes and your own RPM per niche.
• Swipe file: save whole videos, parts of videos (hooks) and thumbnails with notes and tags.
WATCH COMPETITORS
• Exact upload times, the days and hours they usually post, the next expected upload, views in the first 24 hours, title changes.
• Optional notification when a competitor uploads.
TEST THUMBNAILS BEFORE YOU PUBLISH
• CTR Tester: see up to 3 thumbnails among your real competitors in Home, Mobile, Search and Sidebar layouts, plus squint, dark mode and grayscale tests.
• A score for contrast, colour, clutter, small-size readability and how much it stands out — and a step-by-step "Improve CTR" list you can copy in one click.
OPTIONAL AI (your own key)
• Thumbnail review, title ideas, channel / niche analysis and reply drafts with Google Gemini, Claude or OpenAI using your own API key.
SAFE BY DESIGN
• Uses only public YouTube pages. Never signs in to or posts from your YouTube account. Comment replies are drafts you send yourself.
• Your saved data stays in your own browser, with automatic backups you can restore.
Channel Saver needs an activation key. Get yours from letrestart.com.