The advice to 'use active voice' is so common that many writers assume passive voice is simply wrong. It isn't. Both forms are grammatically correct, and both serve different communicative purposes. Understanding when to use each — rather than mechanically avoiding passive voice — is a mark of a sophisticated writer.

Active voice: the subject performs the action ('The researcher conducted three experiments'). Passive voice: the subject receives the action ('Three experiments were conducted'). Active voice is generally more direct, vigorous, and easier to read. It's preferred in most writing contexts because it makes agents and actions clear: who did what.

Passive voice is appropriate when the agent is unknown ('The package was delivered overnight'), unimportant ('Errors were made'), or deliberately obscured for rhetorical reasons. Scientific writing traditionally uses passive voice in methods sections ('The solution was heated to 90°C') to emphasize the process over the individual performing it. This is a convention, not a flaw.

A good rule of thumb: use active voice by default, and switch to passive when there's a specific reason — the agent is irrelevant, you want to vary sentence structure, or disciplinary conventions require it. paraphraserhumantext's grammar checker flags excessive passive voice usage, and the tone changer can help shift writing toward a more active, direct register when your draft feels flat.

Choose the sentence subject based on what the reader needs first

The practical difference in active voice vs passive voice is often about information order. Put the person, group, or thing the reader is tracking near the front of the sentence. In an analysis of a court decision, ‘The court rejected the argument’ keeps attention on the court’s action. In a lab report discussing a sample across several steps, a passive construction can keep the sample as the continuing topic. Before editing, ask what the paragraph is mainly about and make sentence subjects support that focus.

Topic consistency can matter more than changing every passive sentence. If three sentences discuss a policy, repeatedly switching the subject from researchers to lawmakers to agencies may make the paragraph feel jumpy even when each sentence is grammatical. Read the paragraph as a sequence and underline the first few words of every sentence. If the subjects form a clear chain, the paragraph usually feels easier to follow. If they bounce randomly, revise for continuity first and then decide which individual sentences should be active or passive.

Edit passive constructions without changing the meaning

When revising, first identify the action, then ask who actually performs it. A sentence such as ‘The deadline was extended after several complaints were received’ hides two possible agents. If the agents matter, name them: ‘The department extended the deadline after students submitted several complaints.’ If you do not know who acted, do not invent a subject just to force active voice. Instead, keep the accurate wording or restructure the sentence around a known fact. Clarity is more important than mechanically eliminating every form of ‘was.’

Be careful with sentences that look passive but are not. ‘The students were tired’ describes a state, not an action performed on the students. Likewise, a sentence can be wordy without being passive. Search tools that flag every form of ‘be’ will therefore produce false alarms. A better manual test is to ask whether the subject receives an action and whether an agent could logically follow with ‘by.’ Use that test as a diagnostic, then revise only when the sentence becomes clearer, more precise, or more appropriate for the assignment.

Match voice choices to evidence, discipline, and responsibility

Voice can affect accountability. In academic and professional writing, ‘Data were entered incorrectly’ may conceal who made the error, while ‘We entered the data incorrectly’ states responsibility directly. When the actor matters ethically, procedurally, or analytically, active voice often prevents ambiguity. On the other hand, repeating ‘I’ or ‘we’ in every sentence can distract from the evidence. Balance the two by naming the actor when the action or responsibility is important and centering the object or process when that is what the reader needs to follow.

Different instructors and disciplines also have different conventions, so treat voice as a rhetorical choice rather than a universal grammar rule. Check the assignment sheet, recent journal articles in the field, or examples provided by your instructor. If a science course prefers concise method descriptions, follow that model. If a humanities paper expects the writer to make interpretive claims, active constructions may make the argument easier to locate. The best approach to active voice vs passive voice is deliberate control: know what each sentence emphasizes and choose accordingly.