Passive voice gets a bad reputation it doesn't fully deserve. It's not a grammar error, and it's not always weak writing — but it's flagged so often because it tends to hide the most important information in a sentence: who actually did the thing.

What passive voice actually is

In an active sentence, the subject performs the action: "The committee approved the budget." In a passive sentence, the subject receives the action instead: "The budget was approved." Notice what disappeared — we no longer know who approved it. That's the mechanical pattern passive-voice detectors look for: a form of "to be" (is, was, were, been, being) followed by a past-tense verb form, often with the actual doer of the action dropped from the sentence entirely.

When passive voice is genuinely the right choice

Despite the reputation, there are real situations where passive voice is the better tool:

• When the actor is unknown or irrelevant: "The window was broken sometime last night" is more natural than forcing in an unknown subject.
• In scientific and technical writing: "The samples were heated to 200°C" keeps focus on the process and results, not on which lab technician did the heating — which is usually the actual point.
• For diplomatic or tactful phrasing: "Mistakes were made" is passive on purpose — it's a deliberate (if often criticized) choice to avoid naming a specific person.
• When the object matters more than the subject: "The Mona Lisa was painted by Leonardo da Vinci" puts the famous painting first because that's what the sentence is actually about.

The goal isn't zero passive voice. It's noticing when you've used it by default rather than on purpose.

When it actually weakens your writing

Passive voice becomes a real problem in three specific situations:

• It hides responsibility. "Errors were made in the report" avoids saying who made them — useful for evasion, bad for clarity and accountability.
• It adds unnecessary words. Passive sentences are almost always longer than their active equivalent, which quietly drags down your readability score along with your word efficiency.
• It distances the reader from the action. In narrative and persuasive writing especially, active voice creates a stronger sense of motion and agency — readers connect more with "she solved the problem" than "the problem was solved."

A 10-minute rewriting exercise

1. Paste a paragraph of your draft into a passive voice checker.
2. For each flagged sentence, ask: who or what is doing this action? Even if the sentence doesn't currently say, you usually know.
3. Rewrite the sentence with that doer as the subject, and the "to be + past participle" construction replaced with a direct verb.
4. Read both versions aloud. In most cases, the active version will be shorter and clearer — but if the passive version genuinely reads better (the actor really doesn't matter, or you want the object emphasized), that's a legitimate reason to keep it. The point of the check is to make it a choice, not a default.