Ka-Block!
Ka-Block!: A focused, open-source Safari blocker for users who want simple filtering. Ranked #37 of 49 in Ad Blockers by our editors (6.0/10); pricing: Free plan; best for minimalist open-source Safari blocking.
At a glance
- Editor score6.0 / 10
- PricingFree plan
- Best forMinimalist open-source Safari blocking
- Free planYes
- Paid fromFree
- Device coverageDesktop-and-mobile
- Facts checked21 Sep 2026
Where it wins
- Blocks advertising domains and tracking scripts
- Free, open-source apps for macOS and iOS
- Filtering runs through Safari without network connections
Where it doesn't
- Works only with Safari on macOS and iOS
- Uses a curated filter list with updates via app releases
- No manual element controls or verified custom lists
Our verdict on Ka-Block!
Ka-Block! is a free, open-source content blocker for Safari on macOS, iPhone, and iPad. It is aimed at people who want to block advertising domains and tracking scripts without adding a broader browser or network-filtering system. The product integrates with Safari’s content-blocking system and uses a curated filter list, making it a focused option for users who prefer a small, single-browser tool. Its stated goals include blocking most ads and trackers without slowing page loads.
The main appeal is its narrow, privacy-oriented design. Ka-Block! does not contact a server for filtering, and the published feature set includes Safari content blocking, a curated filter list, and an open-source codebase. Filtering is handled through Safari rather than through network connections, which suits users who want browser-level blocking on Apple devices. The free plan includes the listed capabilities, with no paid tier described.
The trade-off is control and coverage. Ka-Block! supports Safari on macOS and iOS, but it is not presented as a multi-browser product. Its filtering rules are curated, and filter-list updates are distributed through app releases; the published positioning does not include verified custom lists or manual element controls. The latest listed app version is 3.5 from November 2021, while the apps remain listed as free. Choose Ka-Block! if free, open-source Safari blocking is the priority. Consider an alternative if you need broader browser support, custom rule management, or more granular page controls.
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Ka-Block! pricing
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Ka-Block! fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Device coverage | Desktop-and-mobile |
| Custom filter lists | No |
| Element picker | Not verified |
| Cookie popup blocking | Not verified |
| Device limit | Not verified |
| Browser support | Single-browser |
| Deployment | Desktop, Mobile, Browser extension, Self-hosted |
| Platforms | macOS, iOS |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan (source) |
| Website | kablock.com |
| Facts checked | 21 Sep 2026 |
Alternatives to Ka-Block!
- AdGuardA broad ad and privacy blocker with browser, app, DNS, and parental controls.9.4
- GhosteryA free, open-source blocker with broad platform coverage and detailed privacy controls.9.2
- uBlock OriginA highly configurable free blocker for users who want control over filtering.9.1
See all Ka-Block! alternatives →
Also Ranked In
Ka-Block! is ranked in 3 of our directories.
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Featured on iTechGuides
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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