4 Free AI Tools Worth Trying This Week

A new wave of free AI tools is targeting real work problems: protecting private data, reviewing code, making sense of spreadsheets, and diagnosing service outages. Here are four that are free to start with and useful from the first run. All were built by small teams, and each does one job well.

Sanitizer: Clean documents before an AI sees them

Sanitizer is a Windows desktop app that scrubs sensitive information out of files before they are sent to an AI assistant. It finds names, contact details, client identities, credentials, and API keys, then removes them or replaces them with opaque tokens. The scrubbing happens entirely on your machine. Heavy PDF and Word files are converted into clean, searchable markdown, so the AI gets a lightweight package instead of binary bloat.

The personal edition is free and installs per user with no admin rights. A business edition costs a one-off fee and adds team policies, with a 15-day trial to test it. A reversible mode lets you un-redact answers locally, so the AI works blind but you do not. If you handle client documents or internal notes, this is a sensible layer of protection before anything leaves your computer.

git-lrc: AI code review on every commit

git-lrc hooks into git and runs an AI review on every diff before it lands. It tracks more than 100 failure patterns across 10 risk categories, including removed logic, weakened constraints, leaked secrets, and expensive cloud calls. That makes it a useful guard for teams shipping code written with AI assistance.

Setup takes about a minute, and the tool is completely free. Each review produces a filterable issue list ranked by severity and a short summary deck that explains what changed and what risks were flagged. The feedback loop learns from thumbs up and thumbs down ratings, so results get sharper over time. It runs on Linux, macOS, and Windows.

CSV AI Analyzer: Analyze data without uploading it

CSV AI Analyzer is an open-source web app that reads a CSV file in your browser and produces insights and charts using your own API key. It detects delimiters automatically, shows a clean data table, and supports bar, line, scatter, pie, and area charts. There is no backend, no upload, and no tracking, so your data never leaves your machine beyond the API calls you choose to make.

It suits marketers, analysts, and anyone who wants quick answers from a spreadsheet without signing up for another platform. The project is open source, so you can also run it yourself.

Not Just You: Find out if an outage is yours

Not Just You checks whether a down AI service is broken for everyone or just for you. It combines official provider status pages, manual community reports, and opt-in client signals that send only metadata like service ID, error code, and duration. Prompts, message bodies, and API keys are never collected.

When Claude Code, ChatGPT, or another tool starts failing, this service answers the 'is it just me?' question in one glance. The code is open source and the live dashboard is free.

Start with the problem, not the tool

All four tools are free on day one and fast to try. Pick the one that matches a problem you actually have this week: privacy for client work, code review before deploys, spreadsheet analysis without uploads, or outage diagnosis when a service flakes.

This article was written by Triweb AI's editorial team based on independent research and testing.