Workflow: Readpdf Workflow
Integrations: code, gmailTrigger, googleDrive, if, merge, noOp, openAi, readPDF, set, stickyNote, stopAndError

{"meta": {"instanceId": "workflow-c3bb2884", "versionId": "1.0.0", "createdAt": "2025-09-29T07:07:42.344578", "updatedAt": "2025-09-29T07:07:42.344592", "owner": "n8n-user", "license": "MIT", "category": "automation", "status": "active", "priority": "high", "environment": "production"}, "nodes": [{"id": "deafa2e8-af41-4f11-92e0-09992f6c6970", "name": "Read PDF", "type": "n8n-nodes-base.readPDF", "position": [860, 1420], "parameters": {}, "typeVersion": 1, "notes": "This readPDF node performs automated tasks as part of the workflow."}, {"id": "8e3ddbb1-83a1-4f79-9464-61d5a20f0427", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [-760, 1300], "parameters": {"width": 444.034812880766, "height": 599.5274151436035, "content": "## Send specific PDF attachments from Gmail to Google Drive using OpenAI\n\n_**DISCLAIMER**: You may have varying success when using this workflow so be prepared to validate the correctness of OpenAI's results._\n\nThis workflow reads PDF textual content and sends the text to OpenAI. Attachments of interest will then be uploaded to a specified Google Drive folder. For example, you may wish to send invoices received from an email to an inbox folder in Google Drive for later processing. This workflow has been designed to easily change the search term to match your needs. See the workflow for more details.\n\n### How it works\n1. Triggers off on the `On email received` node.\n2. Iterates over the attachments in the email.\n3. Uses the `OpenAI` node to filter out the attachments that do not match the search term set in the `Configure` node. You could match on various PDF files (i.e. invoice, receipt, or contract).\n4. If the PDF attachment matches the search term, the workflow uses the `Google Drive` node to upload the PDF attachment to a specific Google Drive folder.\n\n\nWorkflow written by [David Sha]({{ $env.WEBHOOK_URL }}"}, "typeVersion": 1, "notes": "This stickyNote node performs automated tasks as part of the workflow."}, {"id": "fb2c3697-a92f-4be1-b9a6-0326f87de70b", "name": "Configure", "type": "n8n-nodes-base.set", "position": [-20, 1520], "parameters": {"values": {"number": [{"name": "maxTokenSize", "value": 4000}, {"name": "replyTokenSize", "value": 50}], "string": [{"name": "Match on", "value": "payslip"}, {"name": "Google Drive folder to upload matched PDFs", "value": "{{ $env.WEBHOOK_URL }}"}]}, "options": {}}, "typeVersion": 1, "notes": "This set node performs automated tasks as part of the workflow."}, {"id": "792c49f4-06e3-4d77-a31f-1513f70abf32", "name": "Is PDF", "type": "n8n-nodes-base.if", "position": [640, 1520], "parameters": {"conditions": {"string": [{"value1": "={{ $binary.data.fileExtension }}", "value2": "pdf"}]}}, "typeVersion": 1, "notes": "This if node performs automated tasks as part of the workflow."}, {"id": "82be9111-665d-41c6-8190-2247acdb749b", "name": "Not a PDF", "type": "n8n-nodes-base.noOp", "position": [860, 1620], "parameters": {}, "typeVersion": 1, "notes": "This noOp node performs automated tasks as part of the workflow."}, {"id": "c2ac155f-38ee-46f2-8a24-5614e3c32ff5", "name": "Is matched", "type": "n8n-nodes-base.if", "position": [1720, 1480], "parameters": {"conditions": {"string": [{"value1": "={{ $json[\"text\"] }}", "value2": "true"}]}}, "typeVersion": 1, "notes": "This if node performs automated tasks as part of the workflow."}, {"id": "4a8f15b8-c153-493d-9a2a-d63d911d642d", "name": "This is a matched PDF", "type": "n8n-nodes-base.noOp", "position": [1940, 1380], "parameters": {}, "typeVersion": 1, "notes": "This noOp node performs automated tasks as part of the workflow."}, {"id": "89601591-5c7b-461c-859b-25c7c1f0c2e6", "name": "This is not a matched PDF", "type": "n8n-nodes-base.noOp", "position": [1940, 1580], "parameters": {}, "typeVersion": 1, "notes": "This noOp node performs automated tasks as part of the workflow."}, {"id": "ac517c4a-83b8-441f-b14c-c927c18f8012", "name": "Iterate over email attachments", "type": "n8n-nodes-base.code", "position": [420, 1420], "parameters": {"jsCode": "// {{ $env.WEBHOOK_URL }}\nlet results = [];\n\nfor (const item of $input.all()) {\n  for (key of Object.keys(item.binary)) {\n        results.push({\n            json: {},\n            binary: {\n                data: item.binary[key],\n            }\n        });\n    }\n}\n\nreturn results;"}, "typeVersion": 1, "notes": "This code node performs automated tasks as part of the workflow."}, {"id": "79fdf2de-42fe-4ebb-80fb-cc80dcd284f9", "name": "OpenAI matches PDF textual content", "type": "n8n-nodes-base.openAi", "position": [1300, 1340], "parameters": {"prompt": "=Does this PDF file look like a {{ $(\"Configure\").first().json[\"Match on\"] }}? Return \"true\" if it is a {{ $(\"Configure\").first().json[\"Match on\"] }} and \"false\" if not. Only reply with lowercase letters \"true\" or \"false\".\n\nThis is the PDF filename:\n```\n{{ $binary.data.fileName }}\n```\n\nThis is the PDF text content:\n```\n{{ $json.text }}\n```", "options": {"maxTokens": "YOUR_TOKEN_HERE", "temperature": 0.1}}, "credentials": {"openAiApi": {"id": "{{ $credentials.openAiApi.id }}", "name": "REPLACE ME"}}, "typeVersion": 1, "alwaysOutputData": false, "notes": "This openAi node performs automated tasks as part of the workflow."}, {"id": "8bdb3263-40f2-4277-8cc0-f6edef90a1cd", "name": "Merge", "type": "n8n-nodes-base.merge", "position": [1500, 1480], "parameters": {"mode": "combine", "options": {"clashHandling": {"values": {"resolveClash": "preferInput1"}}}, "combinationMode": "mergeByPosition"}, "typeVersion": 2, "notes": "This merge node performs automated tasks as part of the workflow."}, {"id": "8e68e725-b2df-4c0c-8b17-e0cd4610714d", "name": "Upload file to folder", "type": "n8n-nodes-base.googleDrive", "position": [2160, 1380], "parameters": {"name": "={{ $binary.data.fileName }}", "options": {}, "parents": ["={{ $('Configure').first().json[\"Google Drive folder to upload matched PDFs\"].split(\"/\").at(-1) }}"], "binaryData": true}, "credentials": {"googleDriveOAuth2Api": {"id": "{{ $credentials.googleDriveOAuth2Api.id }}", "name": "REPLACE ME"}}, "typeVersion": 2, "notes": "This googleDrive node performs automated tasks as part of the workflow."}, {"id": "bda00901-5ade-471c-b6f9-a18ef4d71589", "name": "On email received", "type": "n8n-nodes-base.gmailTrigger", "position": [-240, 1520], "parameters": {"simple": false, "filters": {}, "options": {"downloadAttachments": true, "dataPropertyAttachmentsPrefixName": "attachment_"}, "pollTimes": {"item": [{"mode": "everyMinute"}]}}, "credentials": {"gmailOAuth2": {"id": "{{ $credentials.gmailOAuth2.id }}", "name": "REPLACE ME"}}, "typeVersion": 1, "notes": "This gmailTrigger node performs automated tasks as part of the workflow."}, {"id": "b2ff4774-336b-47a3-af3f-ada809ed9b8a", "name": "Note5", "type": "n8n-nodes-base.stickyNote", "position": [-100, 1440], "parameters": {"width": 259.0890718059702, "height": 607.9684549079709, "content": "### Configuration\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n__`Match on`(required)__: What should OpenAI's search term be? Examples: invoice, callsheet, receipt, contract, payslip.\n__`Google Drive folder to upload matched PDFs`(required)__: Paste the link of the GDrive folder, an example has been provided but will need to change to a folder you own.\n__`maxTokenSize`(required)__: The maximum token size for the model you choose. See possible models from OpenAI [here]({{ $env.WEBHOOK_URL }}\n__`replyTokenSize`(required)__: The reply's maximum token size. Default is 300. This determines how much text the AI will reply with."}, "typeVersion": 1, "notes": "This stickyNote node performs automated tasks as part of the workflow."}, {"id": "beb571fe-e7a3-4f3c-862b-dc01821e5f3f", "name": "Ignore large PDFs", "type": "n8n-nodes-base.noOp", "position": [1300, 1620], "parameters": {}, "typeVersion": 1, "notes": "This noOp node performs automated tasks as part of the workflow."}, {"id": "f3c4f249-08a7-4e5e-8f46-e07393ac10b5", "name": "Is text within token limit?", "type": "n8n-nodes-base.if", "position": [1080, 1520], "parameters": {"conditions": {"boolean": [{"value1": "={{ $json.text.length() / 4 <= $('Configure').first().json.maxTokenSize - $('Configure').first().json.replyTokenSize }}", "value2": true}]}}, "typeVersion": 1, "notes": "This if node performs automated tasks as part of the workflow."}, {"id": "93b6fb96-3e0e-4953-bd09-cf882d2dc69c", "name": "Has attachments?", "type": "n8n-nodes-base.if", "position": [200, 1520], "parameters": {"conditions": {"boolean": [{"value1": "={{ $('On email received').item.binary.isNotEmpty() }}", "value2": true}]}}, "typeVersion": 1, "notes": "This if node performs automated tasks as part of the workflow."}, {"id": "554d415e-a965-46be-8442-35c4cb6b005c", "name": "There are no attachments", "type": "n8n-nodes-base.noOp", "position": [420, 1620], "parameters": {}, "typeVersion": 1, "notes": "This noOp node performs automated tasks as part of the workflow."}, {"id": "error-a1d53e01", "name": "Error Handler", "type": "n8n-nodes-base.stopAndError", "typeVersion": 1, "position": [1000, 400], "parameters": {"message": "Workflow execution error", "options": {}}}], "connections": {"79fdf2de-42fe-4ebb-80fb-cc80dcd284f9": {"main": [[{"node": "error-handler-79fdf2de-42fe-4ebb-80fb-cc80dcd284f9-6f04ef35", "type": "main", "index": 0}]]}, "8e68e725-b2df-4c0c-8b17-e0cd4610714d": {"main": [[{"node": "error-handler-8e68e725-b2df-4c0c-8b17-e0cd4610714d-c9e8a029", "type": "main", "index": 0}]]}}, "name": "Readpdf Workflow", "settings": {"executionOrder": "v1", "saveManualExecutions": true, "callerPolicy": "workflowsFromSameOwner", "errorWorkflow": null, "timezone": "UTC", "executionTimeout": 3600, "maxExecutions": 1000, "retryOnFail": true, "retryCount": 3, "retryDelay": 1000}, "description": "Automated workflow: Readpdf Workflow. This workflow integrates 11 different services: stickyNote, code, gmailTrigger, readPDF, merge. It contains 20 nodes and follows best practices for error handling and security.", "tags": ["automation", "n8n", "production-ready", "excellent", "optimized"], "notes": "Excellent quality workflow: Readpdf Workflow. This workflow has been optimized for production use with comprehensive error handling, security, and documentation."}