Step-by-Step Implementation of Grammarly
1. Overview
This chapter walks you through a step-by-step guide to implementing a basic version of Grammarly, focusing on grammar correction, spelling checks, and tone detection using Python, NLP libraries, and Transformer models.
We’ll build a Grammarly clone with:
✅ Grammar and spelling correction
✅ Clarity/suggestion rewriting
✅ Tone improvement (professional/friendly)
✅ Real-time editing with Gradio
✅ Outputs shown after every key step
Tech Stack
- Python
- OpenAI GPT-3.5 / GPT-4
- LanguageTool (grammar check)
- Gradio (UI)
Step 1: Install Dependencies
pip install openai gradio language-tool-python
Step 2: Setup OpenAI API Key
import openai
openai.api_key = "YOUR_OPENAI_API_KEY"
Step 3: Grammar and Spelling Check Using LanguageTool
import language_tool_python
tool = language_tool_python.LanguageTool('en-US')
def grammar_check(text):
matches = tool.check(text)
corrected_text = language_tool_python.utils.correct(text, matches)
return corrected_text, matches
✅ Example:
text = "He go to school everyday to learn new thing."
corrected, issues = grammar_check(text)
print(corrected)
🖥️ Output:
He goes to school every day to learn new things.
Step 4: Clarity + Tone Rewriting Using GPT
def rewrite_text(text, tone="professional"):
prompt = f"Rewrite the following text to be more clear, concise, and in a {tone} tone:\n\n{text}"
response = openai.ChatCompletion.create(
model="gpt-3.5-turbo",
messages=[
{"role": "system", "content": "You are a professional writing assistant."},
{"role": "user", "content": prompt}
],
temperature=0.7,
max_tokens=200
)
return response.choices[0].message["content"].strip()
✅ Example:
rewrite_text("I am writing this message to tell you that I can't attend the meeting.", "professional")
🖥️ Output:
I regret to inform you that I will be unable to attend the meeting.
Step 5: Gradio Interface – Grammarly Clone
import gradio as gr
def grammarly_clone(text, tone):
corrected_text, matches = grammar_check(text)
rewritten_text = rewrite_text(corrected_text, tone)
feedback = [f"{m.ruleId}: {m.message}" for m in matches]
return corrected_text, rewritten_text, "\n".join(feedback)
gr.Interface(
fn=grammarly_clone,
inputs=[
gr.Textbox(label="Enter Your Text Here", lines=5, placeholder="Type your sentence..."),
gr.Dropdown(["professional", "friendly", "neutral", "persuasive"], label="Select Tone")
],
outputs=[
gr.Textbox(label="Corrected Grammar"),
gr.Textbox(label="Improved Style & Tone"),
gr.Textbox(label="Grammar Feedback")
],
title="Grammarly Clone - AI Writing Assistant",
description="Check grammar, fix spelling, and rewrite text with better tone using GPT + LanguageTool"
).launch()
Example UI Output
Input:
i dont know if i can make it to the event but maybe later if i m free
Tone:
professional
Corrected Grammar:
I don't know if I can make it to the event, but maybe later if I'm free.
Improved Style & Tone:
I’m unsure if I’ll be able to attend the event, but I may join later if I’m available.
Grammar Feedback:
UPPERCASE_SENTENCE_START: Sentence does not start with an uppercase letter
EN_CONTRACTION_SPELLING: Possible spelling mistake found
COMMA_RULE: Consider using a comma
🧠 Advanced Ideas (Optional Features)
| Feature | Tools |
|---|---|
| Plagiarism checker | Grammarly API / Copyleaks |
| Vocabulary enhancement | GPT prompt + synonym lib |
| Tone detector | VADER, TextBlob |
| Realtime inline editor | TipTap / Draft.js (JS-based) |
| Word/character count | Native Python |
Folder Structure for Grammarly Clone
grammarly-clone/
│
├── grammar.py # LanguageTool logic
├── rewrite.py # GPT rewrite logic
├── app.py # Gradio interface
├── requirements.txt
Summary Table
| Feature | Input Example | Output Example |
|---|---|---|
| Grammar Fix | “He go school everyday.” | “He goes to school every day.” |
| Tone Rewrite | “i am sorry i cant come” (tone: professional) | “I apologize, but I won’t be able to attend.” |
| Feedback | LanguageTool feedback rules | Rule-based corrections & highlights |
Conclusion
You now have a Grammarly-like tool that:
- Checks grammar and spelling using language-tool-python
- Enhances clarity, tone, and flow using GPT
- Has a working, interactive UI built with Gradio
Next Blog- Part 1- Tools for Image and Video Creation: DALL·E
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