© Piotr Sikora 2026 | All Rights Reserved
OCR in n8n for Multiple Receipts and Invoices at Once — Saving to Google Sheets
Extending an n8n OCR workflow to process many receipts or invoices in one run: adjusting the AI agent prompt, handling an array of objects and saving multiple rows to Google Sheets automatically.
Checking Variable Values in n8n: IF vs SWITCH
How to check variable values in an n8n workflow with the IF and Switch nodes — when a simple condition is enough and when complex logic reads better as a Switch.
Automate Your Gmail with n8n — AI-Generated Reply Drafts with an LLM
An n8n workflow that automatically fetches new Gmail messages, analyzes them with an AI Agent and creates ready-to-review reply drafts in your inbox.
n8n: ZPE Lesson Generator — from URL to a Complete Lesson in 90 Seconds
An n8n workflow that turns an e-material from Poland's Integrated Education Platform (ZPE) into a complete teaching package: lesson plan, worksheet, quiz and practical exercises.
How to Automate LinkedIn Profile Search with n8n
A simple n8n workflow that automatically collects LinkedIn profiles based on keywords — using a form, Serp API and Google search. Useful for recruiting and sales.
How to Use the Merge Node in n8n Effectively — a Practical Guide
How the n8n Merge Node works: combining branches and objects with Append, Combine and Choose Branch modes, and dealing with data clashes.
![Automating Receipt OCR into Google Sheets with AI [E015]](/_next/image?url=%2Fassets%2Fblog-images%2Fyt-videos%2FhQL3Ox8J1cY.jpg&w=1920&q=75)
Automating Receipt OCR into Google Sheets with AI [E015]
An n8n workflow that uses AI to recognize data from photos of receipts and invoices and writes it straight to Google Sheets — from chat node, through file upload, to saving the data.
How to Use the Loop Node in n8n — a Complete Guide with a Practical Example
Iterating over array items in n8n: building a workflow that processes items one by one, makes HTTP requests and handles errors along the way.
![Error Handling in n8n #2 — HTTP Requests and Dedicated Error Workflows [E013]](/_next/image?url=%2Fassets%2Fblog-images%2Fyt-videos%2Fj9XY-ID48Rw.jpg&w=1920&q=75)
Error Handling in n8n #2 — HTTP Requests and Dedicated Error Workflows [E013]
Part two of the n8n error-handling series: node error-handling modes, catching HTTP request failures and dedicated error workflows.
![How to Use Sub-workflows in n8n [E012]](/_next/image?url=%2Fassets%2Fblog-images%2Fyt-videos%2F79boE177I9g.jpg&w=1920&q=75)
How to Use Sub-workflows in n8n [E012]
Splitting a large n8n workflow into smaller reusable sub-workflows: passing data between workflows and building an architecture that is easy to maintain.
![How to Handle Errors in n8n (Error Handling) #1 [E011]](/_next/image?url=%2Fassets%2Fblog-images%2Fyt-videos%2FnxRNdK1AZVQ.jpg&w=1920&q=75)
How to Handle Errors in n8n (Error Handling) #1 [E011]
Fundamentals of effective error handling in n8n workflows: what happens when a node fails, the available error-reaction modes and where to start cleaning up error handling.
![Effective Anonymization of Sensitive Data — Guardrails in Bielik vs n8n [E010]](/_next/image?url=%2Fassets%2Fblog-images%2Fyt-videos%2FVzGEzDi8fAs.jpg&w=1920&q=75)
Effective Anonymization of Sensitive Data — Guardrails in Bielik vs n8n [E010]
Hands-on Guardrails tests: comparing sensitive-data anonymization by the Polish Bielik LLM against the built-in Guardrails node in n8n.
n8n: Bielik as Guardrails — Anonymizing Data with a Local LLM
How to use the Polish Bielik model as a local guardrails layer in n8n, anonymizing personal data before it is sent on to AI models.
Parameterizing an AI Agent in n8n with Google Sheets
How to parameterize an AI agent's system prompt in n8n using Google Sheets, so you can manage prompt content dynamically without touching the workflow.
n8n: Guardrails in Action — Testing PII Anonymization
Testing the n8n Guardrails node on data typical for a law firm: emails, card numbers and IBAN account numbers, checking anonymization quality with GDPR in mind.
System Message in the n8n AI Agent — Giving Your Agent a Role and Rules
How to define the system message in an n8n AI Agent so every query is handled according to a fixed role, style and set of rules.
Structured Output Parser in n8n — Forcing an Exact Response Format from AI
AI returning overly long or messy answers? I show how the Structured Output Parser in n8n forces exactly the data format your workflow needs.
![Data Tables in n8n — Creating a Table and Adding Records [005]](/_next/image?url=%2Fassets%2Fblog-images%2Fyt-videos%2Fe005_data_tables.png&w=1920&q=75)
Data Tables in n8n — Creating a Table and Adding Records [005]
Saving chat prompts and building your own database inside an AI workflow using n8n Data Tables — creating a table and adding records step by step.
n8n: AI Agent and Guardrails – Security Basics When Working with AI
Learn how to secure user data in n8n AI agents using the Guardrails node to filter unwanted content and protect sensitive information in your automations.
n8n: AI Agent — How to Build Your Own AI Agent with OpenAI
In this video I show how to build your own AI agent in n8n on top of OpenAI, including a ready-made workflow JSON you can import and use.
FlowLint for n8n: Introduction and HTTP Request
The first video in the FlowLint series — a linter for n8n workflows. Learn how to catch mistakes before you even run the workflow.
Why You Shouldn't Cram Multiple Webhooks Into One n8n Workflow
Discover why cramming multiple webhooks into one n8n workflow backfires, and how splitting them into separate workflows saves you real debugging headaches.
Understanding the Simple Memory Node in n8n AI Agents
Understand how the Simple Memory node works in n8n AI agents, how window size controls context, and why your chatbot suddenly forgets what you told it.
Workflow Automation Platforms Comparison 2025
A complete comparison of 7 leading workflow automation platforms, including n8n, Make, Zapier, and Power Automate, covering pricing, AI, and integrations.
n8n Linter - Flowlint
Let the Flowlint check your n8n workflows for errors and security issues. Robust tool for maintaining high quality of your workflows.
n8n Guardrails - Passing an object
Learn to pass objects to n8n Guardrails by stringifying JSON, sanitizing PII, and parsing back. Full workflow & configuration steps.
n8n Guardrails Testing
Testing n8n Guardrails node announced Oct 30, 2025. Explores anonymization challenges & data restoration for AI automation builders.
n8n forum - Trust level promotion
A few weeks ago, I started contributing to the n8n forum by answering questions and sharing my knowledge.
n8n Workflow: Export WordPress Posts for SEO
An n8n workflow that exports WordPress posts with categories and tags into Google Sheets, helping content managers and SEO teams audit their site taxonomy.
n8n Workflow: Automating LinkedIn Profile Search for HR
An n8n workflow that helps HR recruiters automate LinkedIn profile collection from Google Search into a Google Sheet using simple keywords like job and city.
n8n Workflow: Auto-Assign Categories & Tags with AI
Build an n8n workflow that uses OpenAI to auto-suggest categories and tags for Markdown blog posts in GitHub and log the results in Google Sheets.
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About Me
Piotr Sikora
Process Automation Specialist
I implement automation that saves time and money, streamlines operations, and increases the predictability of results. Specializing in process automation, AI implementation, and workflow optimization using n8n, Python, and JavaScript.
n8n Workflows
Explore my workflow templates on n8n. Ready-to-use automations for blog management, data collection, and AI-powered content processing.
3Workflow Templates
• Auto-Categorize Blog Posts with AI
• Collect LinkedIn Profiles
• Export WordPress Posts for SEO
Piotr Sikora
Mobile+48 505 684 661
Mail Uspiotr.sikora.ck@gmail.com
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