Free Grammarly AI Humanizer Alternative

By AI Humanizer Editorial TeamUpdated

Looking for a free alternative to Grammarly AI Humanizer? AI Humanizer turns AI drafts into natural, human-sounding writing with 1,000 words per run and 2,000 words a day free, no sign-up needed. It keeps your facts and citations and works in English, Spanish and Portuguese. Here is how the two compare.

Original text
Humanized text
Your humanized text will appear here.
0 / 1,000
Free
1,000 words per run; 2,000 words a day without an account, 3,000 with a free account
Sign-up
Not required
Engines
Light and Standard free; Deep in paid plans
Modes
Standard, Academic, Casual, Professional
Languages
English, Spanish, Portuguese
Paid plans
From $4.99 a month, billed yearly

AI Humanizer vs. Grammarly AI Humanizer

Grammarly details as stated on its own website, checked October 2, 2026. Plans change, so check their site for the latest.
AI HumanizerGrammarly AI Humanizer
Free use1,000 words per run, 2,000 a day (3,000 with a free account)Basic humanization on its page; a free account adds four voices and a custom voice
Sign-up for free useNot requiredNot required for the basic tool
Words per run (free)1,000Not stated
Rewrite optionsLight, Standard, Deep engines; 4 modes; 4 reading levelsFour preset voices and a custom voice (free account)
LanguagesEnglish, Spanish, PortugueseSix
AI score checkBuilt in, real third-party detector, source shownNot stated on its humanizer page
Paid plans from$4.99 a month, billed yearlyPro from $12 a month

Grammarly’s humanizer sits next to its grammar and style checker. The page tool gives basic humanization for free, and a free Grammarly account unlocks a Humanizer agent with several voices. AI Humanizer gives you a full rewrite with engine, mode and level controls without any account.

Why people look for a Grammarly AI Humanizer alternative

  • Voices without an account. The basic tool on Grammarly’s page is free, but its Humanizer agent with four preset voices and a custom voice needs a Grammarly account.
  • More control over how much changes. AI Humanizer has three engines, from small fixes to a full rebuild, plus four modes and four reading levels.
  • A lower price for heavier use. Grammarly Pro starts at $12 a month and covers its whole writing assistant. AI Humanizer plans start at $4.99 a month, billed yearly.
  • No account to keep. Grammarly’s extras, such as the custom voice and its AI detector, live in a Grammarly account. If you only want one rewrite now, AI Humanizer needs no email.

How to switch from Grammarly AI Humanizer in three steps

  1. 1

    Paste your original draft

    Start from the AI draft itself rather than a version already rewritten in Grammarly, so the engine works from your real wording. Up to 1,000 words per run are free.

  2. 2

    Pick the closest settings

    Standard engine for a full rewrite, or Light if you only want small fixes. Academic mode for essays, Professional for work writing, Casual for blogs and posts.

  3. 3

    Compare and keep the best

    Read both versions side by side, lock names or citations that must stay, and check the AI score once a day for free.

When Grammarly AI Humanizer may suit you better

  • You want humanizing inside the Grammarly editor and browser extension you already use.
  • You need one of the six languages Grammarly supports beyond English, Spanish and Portuguese.
  • You rely on Grammarly Pro for grammar, tone and clarity suggestions anyway.

What makes AI Humanizer different

  • Free without an account. Paste up to 1,000 words and press Humanize. No email, no card.
  • Keeps your meaning. Every run is checked against your original, and citations, links and any words you choose are locked so they come back exactly as written.
  • No fake typos. The engine never adds spelling mistakes or broken grammar to look human.
  • Three engines. Light for small fixes, Standard for a full rewrite and Deep for the biggest change, with Academic, Casual and Professional modes.
  • Spanish and Portuguese. Each language has its own list of AI phrases to remove, not just a translated prompt.

Is this the right Grammarly AI Humanizer alternative for you?

  • Yes, if you want a free rewrite of up to 1,000 words without an account, in English, Spanish or Portuguese.
  • Yes, if you write essays or reports and need citations, quotes and numbers kept exactly.
  • Maybe not, if you rely on the other tools Grammarly bundles. The list above covers when Grammarly AI Humanizer may suit you better.

What to check in any AI humanizer

  • Does it keep your meaning?. Compare the result with your draft line by line. A rewrite that drops a point or changes a number is worse than no rewrite.
  • Does it invent anything?. Watch for examples, figures or sources that were not in your text.
  • Are citations and quotes untouched?. For school work, a changed quotation or a broken citation is a real problem.
  • Are the limits clear?. Look for words per run, words per day and the price before you paste a long text.
  • Does it promise too much?. No tool can guarantee a result on every AI detector. Claims of 100% are a warning sign.

Frequently asked questions

Is AI Humanizer a free alternative to Grammarly AI Humanizer?+

Yes. You can humanize 1,000 words per run and 2,000 words a day without an account, or 3,000 a day with a free account. Paid plans start at $4.99 a month billed yearly.

Is AI Humanizer affiliated with Grammarly?+

No. AI Humanizer is an independent tool. Grammarly is a trademark of its owner and is mentioned here only to compare the two.

Do I need to sign up?+

No. Paste your text and press Humanize. An account is only needed for more daily words or a paid plan.

Can I use both Grammarly and AI Humanizer?+

Of course. Many people draft or check in one tool and humanize in another. Paste your text here whenever you want a natural rewrite.

Does Grammarly have a free AI humanizer?+

Yes. Grammarly’s page offers basic humanization for free, and a free account adds the Humanizer agent with four preset voices and a custom voice (checked October 2, 2026).

Can I run Grammarly after humanizing here?+

Yes. AI Humanizer corrects spelling and grammar in its rewrite and never adds typos, but a final pass in any checker you trust does no harm.

Which languages does AI Humanizer support?+

English, Spanish and Portuguese, detected automatically.

Will the result pass AI detectors?+

Often, but no tool can honestly promise it. Detectors disagree and change often. Read the result and add your own thoughts and examples.

Related tools

Updated