AI Text Humanization API

Turn any AI-generated text into authentic human writing. One endpoint, any platform.

Free & unlimited during launch. No credit card required.

Self-hosted model
No OpenAI dependency
Data never shared or trained on
3-5s average response

One API call from AI-generated to undetectably human.

curl -X POST https://tohuman.io/api/v1/humanizations/sync \
  -H "Authorization: Bearer $TOHUMAN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "Your AI-generated content here...",
    "intensity": "medium"
  }'

Response

{
  "status": "completed",
  "output_content": "Your naturally rewritten content...",
  "processing_time": 1.42
}
Try it live — no signup needed
0/700
Min 10 chars · Max 700

API

Developer-First API for Text Humanization

POST /api/v1/humanizations/sync

Request:

{ "content": "The implementation of sustainable practices has demonstrated significant outcomes...",

"intensity": "medium" }

Response: 200 OK

{ "output_content": "Going green in cities actually works — and the numbers prove it." }

REST API

One POST request

Send AI text in, get human text back. No SDKs required, no complex setup. If you can make an HTTP request, you can humanize text.

Before

"The implementation of sustainable urban development practices has demonstrated significant positive outcomes across multiple metropolitan areas."

After

"Going green in cities actually works — and the numbers prove it across every major metro that's tried."

Quality

Natural by design

Our self-hosted model doesn't just swap words — it rewrites text to sound naturally human. No templates, no patterns.

~3-5s

avg latency

Performance

Fast responses

Serverless GPU inference means you get results fast without managing infrastructure.

CMS
EdTech
Email
Chatbots
SaaS
Agencies

Use Cases

Embed anywhere

Content platforms, EdTech apps, marketing tools, chatbots — anywhere AI generates text that needs to sound human.

Self-hosted model

No OpenAI. No third parties.

Privacy

Your data stays yours

We run our own fine-tuned model — no OpenAI, no third-party APIs. Your content is never used for training and never shared.

Developer Experience

Integrate AI Text Humanization in Minutes

app.py
import requests

response = requests.post(
  "https://tohuman.io/api/v1/humanizations/sync",
  headers={"Authorization": f"Bearer {API_KEY}"},
  json={"content": "Your AI text...", "intensity": "medium"}
)

Integration

Simple integration

Use any HTTP client in any language. The REST API is all you need — clean endpoints, standard JSON, Bearer auth. No SDKs to install or maintain.

Webhook event
humanization.completed
humanization.failed

Webhooks

Real-time events

Get notified when humanization completes or fails. No polling required.

API Tokens
Documents
Humanization History

Dashboard

Manage your API

Create and manage API keys, track your humanization history, and monitor usage from your dashboard.

min

"intensity": "minimal"

Light touch, preserves your voice

med

"intensity": "medium"

Balanced rewriting

hea

"intensity": "heavy"

Strong transformation

Control

Tune the intensity

Choose minimal, medium, or heavy humanization per request. Trade off between preserving original meaning and maximum transformation.

How it works

Humanize AI text in three steps

ToHuman is an AI text humanization API that converts machine-generated content into natural, human-sounding writing. No SDKs, no complex setup — just a single REST endpoint.

1

Sign up and get your API key

Create a free account and generate your API token in seconds. No credit card required. Your token works immediately — start making requests right away.

2

Send AI-generated text to the API

Make a POST request with your AI-generated content and choose an intensity level — minimal, subtle, medium, or heavy. The API accepts any text from ChatGPT, Claude, Gemini, or any other AI model.

3

Get natural, human-sounding text back

The API returns rewritten text that reads like a person wrote it. Our self-hosted model rewrites — not just paraphrases — your content, preserving meaning while eliminating the robotic tone that AI detectors flag — including, frequently, legitimate human writing.

Unlike other AI humanizer tools, ToHuman is built API-first for developers and teams who need to humanize text programmatically. Whether you're building a content platform, an EdTech product, a marketing automation tool, or a chatbot — you can integrate AI text humanization into your workflow with a single HTTP request.

The humanization model runs on our own infrastructure — your text is never sent to OpenAI, Google, or any third-party AI provider. This means your content stays private and is never used for training.

Convert AI text to human-sounding writing in seconds

ToHuman is the fastest way to go from AI to human text. Paste the output of ChatGPT, Claude, or Gemini into the web tool — or POST it to the API — and the model rewrites it into writing that reads like a person wrote it. The same endpoint that turns AI into human prose in the browser is the one powering every production integration, so whichever interface you pick, the output is identical.

Most humanizers swap synonyms and call it done. ToHuman rewrites sentence structure, rhythm, and cadence — the things that actually separate machine writing from human writing. See the full pricing (free during launch) or jump into the API docs to start converting AI-generated text into human output today.

Use cases

Anywhere AI writes, you need this.

One API call turns robotic AI output into text that reads like a person wrote it. Here's where teams use it.

Blog posts & articles

Draft with AI, publish as human. Content teams use ToHuman to remove the robotic feel from AI-generated blog posts before they go live.

Email campaigns

AI-drafted emails that don't sound like AI. Marketing teams humanize outbound sequences so every message feels personal, not templated.

Chatbots & assistants

Make your chatbot sound like a person. Pipe AI responses through ToHuman before they reach the user for a more natural conversation.

EdTech & learning

Help students learn to write, not just generate. AI detectors flag human writing as AI up to 61% of the time for ESL students — ToHuman protects legitimate work from false positives.

Marketing & ad copy

Scale your creative output without sounding generic. Agencies run AI-generated ad copy through ToHuman for authentic messaging.

SaaS products

Add humanization as a feature. Embed ToHuman into your product so your users can humanize AI text without leaving your app.

Frequently asked questions

Can't find what you're looking for? Check the API docs or email us at [email protected].

Is ToHuman free?
Yes. ToHuman is completely free and unlimited during our launch period — no credit card required, no usage caps. Sign up, get your API key, and start humanizing text immediately. We'll introduce paid plans later, but early users will be grandfathered in.
How does AI text humanization work?
ToHuman uses a self-hosted, fine-tuned language model that rewrites AI-generated text to sound naturally human. Unlike simple synonym swappers, it restructures sentences, adjusts rhythm and cadence, and varies tone — the things that actually distinguish human writing from machine output. You send text to the API, and it returns a rewritten version that preserves the original meaning.
Will humanized text pass AI detectors?
Our model is designed to produce writing that reads like a person wrote it, not to specifically "beat" any detector. That said, because it genuinely rewrites text rather than just shuffling words, the output naturally scores as human on most detectors. Results depend on the input, the intensity level you choose, and the detector being used.
Is my data private?
Yes. We run our own model on our own infrastructure — your text is never sent to OpenAI, Google, or any third-party AI provider. Your content is processed, returned, and not stored beyond what's needed for your humanization history. It's never used for training.
What's the difference between ToHuman and other AI humanizers?
Most humanizers are consumer tools — paste text in a box, get a result. ToHuman is API-first, built for developers and teams who need to humanize text programmatically at scale. It's a single REST endpoint that works with any language or platform. We also run our own model (no OpenAI dependency) and give you intensity controls (minimal, medium, heavy) per request.
What languages and frameworks does the API work with?
Any language that can make an HTTP request. The API is a standard REST endpoint with JSON payloads and Bearer token auth. We have examples for cURL, Python, Node.js, and Ruby, plus integration tutorials for n8n, Make.com, Zapier, LangChain, CrewAI, and MCP.
How fast is the API?
Typical responses take 3–5 seconds. The model runs on serverless GPU infrastructure that scales on demand. The first request after a cold start may take longer (up to 60 seconds), but subsequent requests are fast.
What is an AI humanizer?
An AI humanizer is a tool that rewrites AI-generated text (from ChatGPT, Claude, Gemini, etc.) so it reads like it was written by a human. AI text has recognizable patterns — predictable word choices, uniform sentence lengths, lack of natural variation — that AI detectors and human readers both notice. A humanizer restructures that writing to sound natural. ToHuman uses a fine-tuned language model to do this at the sentence structure level, not just by swapping synonyms.
How do I make ChatGPT text undetectable?
The most reliable method is to humanize it with a dedicated tool. Paste your ChatGPT output into ToHuman, choose "heavy" intensity, and the model rewrites it to read naturally human — adjusting sentence structure, rhythm, and vocabulary patterns. This is more effective than manual rewriting because AI humanizers are specifically trained on what detectors look for. You can try it free on this page — no account needed for the first 700 characters.
Does ToHuman work with Turnitin?
In our April 2026 testing, ToHuman's heavy intensity mode produced output that scored below Turnitin's AI detection threshold in roughly 79% of test runs on a standard 500-word essay. Results vary depending on the original text, the length of the submission, and how Turnitin's model updates over time. No tool can guarantee 100% bypass — and Turnitin itself acknowledges a 15% miss rate even for unhumanized AI text. We test regularly and update our model to stay current.
Is there a free AI humanizer?
Yes — ToHuman is free and unlimited during our launch period. No credit card, no word limits. You can also try it without creating an account: paste text into the demo on this page and see the output immediately (limited to 700 characters). For longer documents, sign up for a free account and you get full access to the API and the web interface.