Product help
GPTHuman Help Center
Choose the right writing tool, understand limits and file imports, protect source facts, and find the fastest path when something does not work.
Reviewed by GPTHuman Editorial Team ·
- Writing tools
- 5
- Humanizer, detector, writer, grammar, and readability.
- Interface locales
- 10
- Use the language menu on fully localized product pages.
- Get support
- 2 paths
- Public contact form or account support ticket.
Choose a tool by the job you need to do
Start with the outcome, not the product name. Each tool owns a different part of the writing workflow.
- ReviseAI HumanizerRework stiff or repetitive phrasing while preserving the draft’s facts and intent.
- ReviewAI DetectorEstimate AI-associated language patterns without treating the score as proof.
- DraftAI WriterCreate a structured starting draft from a topic, format, and tone.
- Plan and reviewFree editorial templatesDownload practical files for content briefs, brand voice, fact-checking, readability, review, and AI-use disclosure.
- CorrectGrammar ImproverFix grammar, spelling, punctuation, and awkward phrasing with minimal intervention.
- MeasureReadability ScorerCalculate reading-ease and grade-level indicators without an AI-provider call.
- GuideHow to use the AI HumanizerFollow a fact-preserving workflow from source draft to final review.
A safe four-step workflow for every tool
Keep the source
Save the original draft, prompt, notes, and citations before you run a tool. You need them to catch changed meaning.
Give the tool enough context
Submit a complete passage or a specific brief. Very short fragments provide less useful evidence and can produce unstable results.
Compare instead of accepting
Read the result beside the source. Check names, numbers, dates, quotations, URLs, formatting, and technical terms first.
Add human judgment
Verify claims, add your own examples and expertise, and follow the disclosure or integrity rules that apply to the final work.
Accounts, daily limits, and plans
- Guest access
- You can try public tools without an account. Guest usage is limited and associated with operational signals needed to enforce the daily allowance.
- Free account
- Signing in raises the available daily allowance under the current Free plan and adds account usage history. Check Pricing for the live limits.
- Paid plans
- Higher tiers raise the configured daily word allowance. The current site records a plan or payment request for manual follow-up; it does not run automatic card checkout.
- Usage history
- History contains operational records such as tool, word count, and timestamp. It is not designed to store the submitted draft or generated result.
File imports and supported content
Tool editors can import text from TXT, Markdown, CSV, TSV, JSON, HTML, XML, PDF, and DOCX files. The server checks the extension, MIME type, request size, extracted-text size, document structure, and page or archive safety limits before returning text to the editor.
- A scanned image-only PDF may contain no extractable text. Use OCR before import when you are authorized to process the document.
- Tables, footnotes, tracked changes, and complex document formatting may not survive plain-text extraction.
- After import, check the extracted text before running a writing tool. Missing headings or merged columns can change meaning.
- Do not upload confidential, regulated, or third-party material unless you are authorized to process it through the selected tool.
What happens to submitted text
| Activity | AI provider receives text? | Application usage history stores text? |
|---|---|---|
| AI Humanizer | Yes | No — operational usage fields only |
| AI Detector | Yes | No — operational usage fields only |
| AI Writer | Yes — topic and instructions | No — operational usage fields only |
| Grammar Improver | Yes | No — operational usage fields only |
| Readability Scorer | No AI-provider call | No text — operational usage fields only |
The configured hosting and AI providers may process requests under their own logging and retention terms. Read the full Privacy Policy, AI Disclosure, and Cookies Policy before submitting sensitive material.
Common problems and the first useful check
| Problem | Check first | Next step |
|---|---|---|
| The button stays disabled | Confirm the required field contains enough text. | Use a complete passage; the minimum varies by tool. |
| Input is too short | Detector needs 50 words; readability needs 20; editing tools need 10. | Add relevant surrounding context rather than unrelated filler. |
| Daily limit reached | Review the usage total and current plan. | Wait for the UTC daily reset or request a higher plan. |
| File import fails | Check format, size, PDF pages, and whether the file contains readable text. | Export a simpler TXT or DOCX copy and try once more. |
| AI service unavailable | Keep the source draft and do not resubmit repeatedly. | Try again later; provider fallback may still be unavailable. |
| Result changed a fact | Compare every factual element with the saved source. | Restore the source fact and revise manually before publishing. |
Use the output responsibly
- Follow the AI, disclosure, authorship, and citation rules of your school, employer, client, or publisher.
- Do not use a detector score as the only basis for an accusation or penalty.
- Do not humanize copyrighted work to conceal copying or remove required attribution.
- Do not publish invented sources, testimonials, product claims, results, or statistics.
- Keep a person accountable for final facts, links, tone, and publication approval.
See the Ethical Use Policy for concrete acceptable and unacceptable examples.
When to contact support
- Public supportContact formUse for product, access, policy, or general questions. Include the page URL and exact error wording.
- Account supportOpen a support ticketSigned-in users can keep account-specific requests together in the dashboard.
- Quick answerFrequently asked questionsReview product, detector, privacy, plan, and API availability answers.
Frequently asked questions
Which GPTHuman tool should I use first?
Use the AI Humanizer for phrasing and tone, AI Detector for a cautious pattern estimate, Grammar Improver for corrections, Readability Scorer for reading metrics, and AI Writer for a structured first draft.
Can I use GPTHuman without an account?
Yes, public tools support limited guest access. Signing in provides the current Free-plan allowance and account usage history.
Why did my result change on a second run?
AI-backed tools use generative model providers, so outputs can vary. Keep the source, compare changes, and rerun only when you have a specific reason.
Where is the public GPTHuman API?
A public API is not currently available. Use the contact form if you want to ask about future access.
Related resources
Start with the tool that matches the job
Keep the source, make one purposeful change at a time, and verify the result before it becomes part of a published or submitted document.
Open AI Humanizer