cleantools.app

What it is

CleanTools is a privacy-first Chrome PDF tool built around the idea that it “works even offline.” It processes PDFs locally in the browser via WebAssembly, with core use cases including electronic signatures for sensitive documents such as contracts, NDAs, and agreements, as well as PDF merging. The site repeatedly emphasizes that files are not uploaded, users are not tracked, and documents never leave the user’s device.

Core features and technical approach

In terms of functionality, CleanTools currently focuses on local e-signatures, PDF merging, offline processing, and fast downloads. The free plan also supports unlimited signatures, but adds a “Signed with CleanTools Free” watermark; PDF merging is limited to 3 times per day on the free plan. PDF compression is still listed as Coming Soon. Its main differentiator is not feature breadth, but its “zero-server architecture”: processing runs inside the browser sandbox and can even be verified by disconnecting Wi‑Fi.

Pricing and licensing

Pricing is straightforward: the free plan is $0; Personal is $4.99/month, with 50% savings on annual billing, and the comparison table lists $29.99/year. The paid plan includes unlimited merging, watermark-free professional signatures, up to 3 devices, priority processing, and a 14-day money-back guarantee. One point to note is that Personal users still undergo a background license check every few days for anti-piracy and critical security updates, while the actual file processing is still claimed to remain offline.

Pros and cons

The strengths are a clear privacy narrative, no need to upload sensitive PDFs, and offline usability, making it suitable for secure networks, airplanes, and other no-internet environments. Basic use requires no registration, and unlimited signatures on the free plan are also user-friendly. The drawbacks are its relatively narrow feature set, no stated support for platforms beyond Chrome, and no disclosure around open source status, API/SDK availability, self-hosting, or enterprise integrations. For developers and companies that need batch processing, automation APIs, team collaboration, or audit capabilities, the current information is insufficient.

Who it is for and access from China

CleanTools is better suited to individual professionals who frequently sign or merge sensitive PDFs, such as lawyers, consultants, freelancers, procurement staff, and administrative users, rather than platform teams looking for a complete PDF suite or developer integration. The main text does not provide information on access from mainland China, and the availability of Chrome extension installation, Freemius payments, and license verification is also unclear, so access should be considered unknown. If it is not available locally, a local desktop PDF application or another offline PDF tool may be a practical alternative.