Convert LINE handwritten memo images to tagged, searchable notes with Gemini, Google Drive and Google Sheets

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1. Workflow Overview

LINE AI Handwritten Memo OCR & Tag Search System This workflow converts handwritten memo images sent via LINE into structured, searchable knowledge using AI.Users simply send a handwritten memo pho...

Best for

Document Extraction automation workflows
AI Summarization automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.webhook, n8n-nodes-base.httprequest, n8n-nodes-base.googledrive, @n8n/n8n-nodes-langchain.chainllm, @n8n/n8n-nodes-langchain.lmchatgooglegemini, n8n-nodes-base.code, n8n-nodes-base.if, n8n-nodes-base.googlesheets

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Hiroshi Hashimoto.

Original n8n.io source

1.1 Workflow description

Title: Convert LINE handwritten memo images to tagged, searchable notes with Gemini, Google Drive and Google Sheets
Workflow name: Convert LINE handwritten memo images to tagged, searchable notes with Gemini, Google Drive and Google Sheets

LINE AI Handwritten Memo OCR & Tag Search System

This workflow converts handwritten memo images sent via LINE into structured, searchable knowledge using AI.Users simply send a handwritten memo photo. The workflow automatically performs OCR, summarizes the content, generates tags, and stores the results in Google Sheets.Images are archived in Google Drive, allowing easy access to the original memo later.

Main Features

• AI OCR for handwritten memo recognition • Automatic title and summary generation • Tag extraction for knowledge organization • Image archiving in Google Drive • Structured storage in Google Sheets • Tag-based memo search via LINE • Tag list generation for easy navigation

User Commands (via LINE)

Send an image → The memo is analyzed, summarized, tagged, and saved automatically.

#タグ名 → Searches memos that contain the specified tag.

#タグリスト → Displays all tags currently stored in the database.

Workflow Steps

Receive message from LINE via Webhook
Validate message type (image or command)
Save image to Google Drive
Run AI OCR and generate structured JSON
Parse and validate AI output safely
Store memo data in Google Sheets
Send completion message to the user

If OCR fails, the user receives guidance to retake the photo.

Stored Data Structure

Each memo record includes:

• Title • Summary • Tags • Timestamp • Link to the original image

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - LINE_Receive_Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 2 - LINE_Download_ImageContent

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.3

Block 3 - Drive_Upload_Image

Type / Role: n8n-nodes-base.googleDrive - googleDrive
Config choices: Version 3

Block 4 - AI_OCR_Analyze_Image

Type / Role: @n8n/n8n-nodes-langchain.chainLlm - chainLlm
Config choices: Version 1.7

Block 5 - AI_Model_Gemini

Type / Role: @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
Config choices: Version 1

Block 6 - Data_Parse_OCR_JSON

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 7 - AI_Check_OCR_Failure

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.3

Block 8 - LINE_Reply_NoImage

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.3

Block 9 - Sheets_Append_Row

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.7

Block 10 - LINE_Push_Completion_Message

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.3

Block 11 - Config_Set_Environment

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 12 - LINE_Reply_Processing

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.3

Block 13 - LINE_Push_NoSummary

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.3

Block 14 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 15 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 16 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 17 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 18 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 19 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 20 - Sticky Note6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 21 - Sticky Note7

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 22 - Sticky Note8

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 23 - Extract_Tag

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 24 - Filter_By_Tag

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Showing the first 24 of 36 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	Convert LINE handwritten memo images to tagged, searchable notes with Gemini, Google Drive and Google Sheets
Complexity	advanced
Nodes	36
Categories	Document Extraction, AI Summarization
Author	Hiroshi Hashimoto
Published	31 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/14502/14502.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Document Extraction workflows AI Summarization workflows

Frequently asked questions

What does Convert LINE handwritten memo images to tagged, searchable notes with Gemini, Google Drive and Google Sheets do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Document Extraction, AI Summarization use case.

Hiroshi Hashimoto

3 workflows

Nodes

n8n-nodes-base.webhook n8n-nodes-base.httprequest n8n-nodes-base.googledrive @n8n/n8n-nodes-langchain.chainllm @n8n/n8n-nodes-langchain.lmchatgooglegemini n8n-nodes-base.code n8n-nodes-base.if n8n-nodes-base.googlesheets

Complexity

advanced

Published 31 Mar 2026

Likes 0

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Install path: /data/workflows/14502/14502.json

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Convert LINE handwritten memo images to tagged, searchable notes with Gemini, Google Drive and Google Sheets

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

LINE AI Handwritten Memo OCR & Tag Search System

Main Features

User Commands (via LINE)

Workflow Steps

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - LINE_Receive_Webhook

Block 2 - LINE_Download_ImageContent

Block 3 - Drive_Upload_Image

Block 4 - AI_OCR_Analyze_Image

Block 5 - AI_Model_Gemini

Block 6 - Data_Parse_OCR_JSON

Block 7 - AI_Check_OCR_Failure

Block 8 - LINE_Reply_NoImage

Block 9 - Sheets_Append_Row

Block 10 - LINE_Push_Completion_Message

Block 11 - Config_Set_Environment

Block 12 - LINE_Reply_Processing

Block 13 - LINE_Push_NoSummary

Block 14 - Sticky Note

Block 15 - Sticky Note1

Block 16 - Sticky Note2

Block 17 - Sticky Note3

Block 18 - Sticky Note4

Block 19 - Sticky Note5

Block 20 - Sticky Note6

Block 21 - Sticky Note7

Block 22 - Sticky Note8

Block 23 - Extract_Tag

Block 24 - Filter_By_Tag

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions