Free AI Chrome extensions — what's actually free in 2026
"Free" in the Chrome Web Store means the install costs nothing. It says nothing about whether you can actually use the thing. This guide separates genuinely free tools from trials wearing a free badge.
The three kinds of "free"
1. Genuinely free forever
A real ongoing allowance you can rely on month after month. You may hit the ceiling, but it resets and you're never locked out. Examples: Grammarly's free tier, ChatGPT for Google, WriterPi's 25 messages/month.
2. Free trial in disguise
A generous-looking allowance that's actually one-time. You get 50 messages, use them in a week, and then the tool is a paywall. Technically "free to install", practically a trial. Very common.
3. Free but useless
Five messages a month, or a daily cap so tight you can't finish a single real task. This exists to get you into the funnel, not to be used. Check the number before you install.
Comparison table
| Extension | Free allowance | Signup needed? | Verdict |
|---|---|---|---|
| WriterPi | 10 msgs no signup, then 25/mo | No, for first 10 | Genuinely free tier |
| ChatGPT for Google | Unlimited via your own login | ChatGPT account | Genuinely free |
| Grammarly | Core grammar checks, ongoing | Yes | Genuinely free |
| Sider | Small daily cap | Yes | Usable but tight |
| Monica | Demo-level daily cap | Yes | Trial in practice |
| Merlin | Starter credits | Yes | Trial in practice |
| Compose AI | Limited completions | Yes | Usable for light use |
| Jasper / Copy.ai | Trial only | Yes + card | Not free |
The no-signup question
Almost every AI extension makes you create an account before your first message. That's a real friction point — you're handing over an email address to test something you might uninstall in 90 seconds.
WriterPi gives you 10 messages with no signup at all. Install, click, use. If you like it, sign up for 25/month free. If not, uninstall and you've given up nothing. That was a deliberate design choice, and it's still rare in this category.
What free tiers are actually good for
- Evaluating the tool. Ten messages is enough to know whether the writing quality and interface suit you.
- Light, occasional use. If you draft two emails a week with AI, a 25/month tier covers you forever.
- Filling gaps. Run one paid tool for your main workflow and free tiers of two others for overflow.
What they're not good for
- Daily professional work. If AI is part of your job, you'll hit any free ceiling within days.
- Anything with a deadline. Running out mid-task is worse than paying $6.
- Long documents. Free tiers usually cap input length as well as message count.
Questions to ask before installing anything "free"
- What's the actual number — per day, per month, or one-time?
- Does it reset, or is it a one-off allowance?
- Do I need to hand over a card to start?
- Does the free tier include the features I care about, or only the basic ones?
- What happens to my data on the free tier? (Some tools train on free-tier usage and not paid.)
That last one matters more than people realise. Read the privacy policy, or at minimum search it for the word "train".