You know what really surprised me the other day? An online tool that doesn't just help with grammar, but does it so delicately and intelligently that you feel like you have an experienced editor standing over your shoulder. At first I was skeptical about such sites - how many of these checks can you do? But here everything turned out to be different. The interface is clean, without unnecessary clutter. I went in, pasted the text, and literally in a couple of seconds received a detailed analysis: grammar, punctuation, stylistics - everything is in place here
https://textero.io/free-ai-pdf-summarizer . The system doesn't just point out the error, but explains what is wrong and why it is better to change the sentence. Very convenient, especially when you need to tighten up your English. I was particularly pleased that the check does not turn into a formal process. It feels like a dialog: you are offered options, shown the weaknesses of the text, helped to make it better, but not forced. You decide for yourself whether to accept the hint or not. And in this you feel respect for the author.