Active Voice Detector is an easy-to-use, web-based active voice checker that allows you to check an unlimited number of words. It has a built-in spelling and grammar proofreader to ensure flawless writing. It underlines mistakes and provides a suggestion for each error.

Grammarly is a passive voice corrector that provides suggestions for changing it to active voice. It has tons of other features, including tone changers, grammar, spelling, and plagiarism checkers. The tool is available as an add-on for word processors and a web-based tool.

Ginger software is a premium active voice generator that finds and fixes such instances in your writing. It has a robust grammar and spelling checker that can use various dialects such as UK, Australian, and Canadian English.

WhiteSmoke is a versatile tool to check instances of passive voice in your writing. Its proofreader checks grammar, spelling, comma splices, and poor word usage. It also has a plagiarism and tone checker. You can add it to your word processor for quick proofreading.

ProWritingAid is also a premium active to passive voice converter for instances where passive voice is necessary. On the other hand, you can use it to convert the passive to active voice. It also has an easy-to-use editor.

You may use this free active voice checker to convert passive voice phrases to active voice in no time. It also has a robust grammar checker that fixes everything from grammar to style and syntax errors.

As the name suggests, Language Tool is an online proofreader that allows you to check active voice across various languages. This is a free and premium tool, which is web-based and comes with a robust grammar checker.

SentenceCheckup is an active to passive voice converter that has built-in grammar and spelling checkers. It also connects you to Grammarly for deep scan and other premium features. The web-based tool is free to use.

Paper Rater has a free and paid version. In addition to generating active voice alternatives to your passive voice sentences, it also grades your work against similar work done by students at your level.

Linguix is an AI-based active voice translator. In addition to converting sentences to active voice, it changes tone, checks style, and poor word usage. You can try it free but have to pay for premium features.