Blog
Guides to automate
Tips and tutorials to generate images, PDFs, QR codes and screenshots from n8n, Make and Zapier. No fluff.
How to add page numbers to a PDF (reports, contracts, dossiers)
How to add page numbers to a PDF that doesn't have them: choose where they go, start from a number other than 1, and number just a range without losing track of the real page count.
Give Your n8n AI Agent the Power to Read Web Pages
Let an n8n AI Agent read any web page: the free HTTP Request tool with Optimize Response, and a Markdown API that returns only the main content. Safety tips included.
ApiFlash alternative: when Cofferdock makes sense (and when it doesn't)
ApiFlash or Cofferdock for website screenshots through an API: pricing, limits and features. An honest comparison with September 2026 data.
Business Days in n8n: Add Working Days and Skip Public Holidays
n8n can add days to a date, but it counts weekends and holidays. How to add business days, check if a date is a working day and count them, with one HTTP Request node.
How to see who created a PDF (and change the author)
See a PDF's author, title, dates and the program that made it in seconds with Acrobat Reader, Chrome or Preview, why it isn't proof, and how to change it.
HTML to Image: 6 Ways to Convert HTML to PNG or JPG (with Code)
Convert HTML to an image in the browser (html-to-image, html2canvas), with Puppeteer or Playwright, from Python, PHP, Java or .NET, or with one API call.
How to Convert Images to WebP: Free Tools and Automatic Conversion
Turn JPG or PNG images into WebP for free in your browser with Squoosh, with GIMP or the cwebp command, how much smaller they get, and how to convert them automatically.
How to convert PDF pages into images
How to get an image out of a PDF for a thumbnail, a preview or a social post, and how to convert every page into PNG automatically instead of taking screenshots.
How to combine multiple photos into one PDF (phone or computer)
iPhone, Android, Windows or Mac: turn several photos (receipts, contracts, an ID) into a single PDF in order without installing anything, and automate it.
How to create charts in Make from your data
Generate a bar, line or pie chart in Make with the HTTP module and the Cofferdock API. Great for automatic reports in Slack, email or Google Drive.
How to create charts in n8n from your data
Turn the data in your n8n workflow into a bar, line or pie chart with the HTTP Request node and the Cofferdock API. Step by step, with an example.
How to create charts in Zapier from your data
Generate a bar, line or pie chart in Zapier with Webhooks by Zapier and the Cofferdock API, then send it to Slack or by email. Step by step.
How to zip multiple files into one (and automate it)
Windows, Mac or iPhone: how to put several files into one .zip in a few clicks, whether it really saves space, and how to automate it if you do it daily.
How to Extract Text from a PDF (Even When You Can't Copy It)
Copy the text out of a PDF by hand, what to do when it's a scan, the text comes out garbled or copying is blocked, and how to extract text from many PDFs automatically.
How to Fill Out a PDF Form (By Hand or Automatically)
Fill in a PDF form for free with Acrobat Reader, Preview or your browser and save it, what to do when it has no fields, and how to fill hundreds of PDFs automatically.
Firecrawl Alternative: When Cofferdock Makes Sense (and When It Doesn't)
Firecrawl or Cofferdock to turn web pages into Markdown: prices, features and real differences, including where Firecrawl is the better choice. Data from October 2026.
How to Fix a Damaged or Corrupted PDF That Won't Open
What to try when a PDF won't open or shows an error: another viewer, printing to a new PDF, downloading it again, the qpdf command, when it can't be saved, and how to repair PDFs automatically.
How to generate a QR code in Make (HTTP module)
Generate QR codes in PNG or SVG in Make with the HTTP module and the Cofferdock API. Links, text and orders, step by step.
How to generate a QR code in n8n (with a single node)
Generate QR codes in PNG or SVG from n8n with the HTTP Request node and the Cofferdock API. Links, text and orders, step by step.
How to generate a QR code in Zapier (Webhooks)
Generate QR codes in Zapier with Webhooks by Zapier and the Cofferdock API. Step by step, example and its limits with images.
How to generate UUIDs in Make (HTTP module)
Generate one or several v4 UUIDs in Make with the HTTP module and the Cofferdock API. Great for unique IDs, deduplicating records, or naming files without collisions.
How to Generate a UUID in n8n (Free, with the Crypto Node)
n8n generates UUIDs for free with the Crypto node (Generate, Type UUID). Step by step, plus when an API makes sense: up to 100 UUIDs in one call.
How to Hash Text in Make (MD5, SHA-1, SHA-256, SHA-512) for Free
Make has built-in md5, sha1, sha256 and sha512 functions you can use in any field, with HMAC keys too. Step by step, and when an API helps.
How to Hash Text in n8n (MD5, SHA-256, SHA-512) for Free
n8n hashes text for free with the Crypto node or the hash() expression: MD5, SHA-256, SHA-512 and more, for text or files. Step by step, and when an API helps.
HTML to Image in Make: Step-by-Step with the HTTP Module
Turn HTML into PNG, JPEG or WebP images in Make (Integromat) with the HTTP module: field-by-field setup, mapping data, ready-made templates, saving to Google Drive and fixes for common errors.
HTML to Image in n8n: Step-by-Step Guide + Free Workflow
Turn HTML into PNG, JPEG or WebP in n8n with one HTTP Request node. Works on n8n Cloud and self-hosted. Free workflow to import, setup and common fixes.
How to turn HTML into an image in Zapier (Webhooks)
Generate images from your HTML in Zapier with Webhooks by Zapier and the Cofferdock API. Step by step, example and its limits with images.
How to convert HTML to PDF in Make (HTTP module)
Generate PDFs from your HTML in Make with the HTTP module and the Cofferdock API. Invoices, reports and tickets, step by step with an example.
HTML to PDF in n8n: Invoices and Reports with One Node (Free Workflow)
Convert HTML to PDF in n8n with the HTTP Request node: field-by-field setup, a free invoice workflow to import, dynamic data, page size and margins, and fixes for common errors.
How to convert HTML to PDF in Zapier (Webhooks)
Generate PDFs from your HTML in Zapier with Webhooks by Zapier and the Cofferdock API. Step by step, example and its limits with files.
htmlcsstoimage alternative: when Cofferdock makes sense (and when it doesn't)
We compare htmlcsstoimage and Cofferdock for turning HTML into images: pricing, limits and what else each one includes. Data from September 2026.
How to merge PDF files in Make (HTTP module)
Merge 2 to 20 PDFs into one in Make with the HTTP module and the Cofferdock API. Great for combining a generated invoice with its terms, or several attachments into a single file.
How to merge PDF files in n8n (one node)
Merge 2 to 20 PDFs into one from n8n with the HTTP Request node and the Cofferdock API. Great for combining a generated invoice with its terms, or several attachments into a single file.
OCR in Make: Read Text from Images (Built-in or API)
Read text from images in Make: the built-in AI Content Extractor, Google Cloud Vision, and a self-hosted OCR API for printed text in English and Spanish, step by step.
OCR in n8n: Read Text from Images and Scanned PDFs
Extract text from images and scanned PDFs in n8n: which built-in nodes help, which need an outside account, and a self-hosted OCR API for printed text in English and Spanish.
How to add (and remove) a password on a PDF
How to protect a PDF with a password before sending it, and how to remove that password later if you know it and no longer need it, with AES 256-bit encryption.
QuickChart alternative: when Cofferdock makes sense (and when it doesn't)
QuickChart or Cofferdock for creating charts through an API: pricing, limits and the real differences. An honest comparison with September 2026 data.
How to Rotate a PDF That's Upside Down and Save It (Free)
Fix an upside-down or sideways PDF for good: on a Mac with Preview, on an iPhone with Files, why Acrobat Reader and browsers only rotate the view, and how to automate it.
Web Scraping in Make: Get Any Page as Text or Markdown
Scrape a web page in Make for free with the HTTP module and HTML to text, and when an API that returns clean Markdown with only the main content is worth it.
n8n Web Scraping: Get Any Page as Clean Markdown (Free or API)
Scrape a website in n8n for free with HTTP Request and the Markdown node, and when to use an API that runs JavaScript and keeps only the main content.
Web Scraping in Zapier: Web Parser (Free) or a Markdown API
Scrape a web page in Zapier with the built-in Web Parser, and when Webhooks plus an API that runs JavaScript and keeps only the main content is worth it.
How to take a full-page screenshot of a website (no software needed)
Chrome, Edge, Firefox, iPhone or Android: how to capture an entire web page, scroll included, without installing anything, and how to automate it for many pages.
How to take a screenshot of a website in Make (HTTP module)
Capture any website in Make with the HTTP module and the Cofferdock API. Thumbnails, previews and archiving how a page looked.
How to take a screenshot of a website in n8n (with a single node)
Capture any website from n8n with the HTTP Request node and the Cofferdock API. Thumbnails, previews and archiving how a page looked.
How to take a screenshot of a website in Zapier (Webhooks)
Capture any website in Zapier with Webhooks by Zapier and the Cofferdock API. Step by step, example and its limits with images.
How to generate a URL slug in Make (HTTP module)
Turn any text into a URL slug (no accents, no spaces) in Make with the HTTP module and the Cofferdock API. Great for publishing content automatically to a CMS.
How to generate a URL slug in n8n (one node)
Turn any text into a URL slug (no accents, no spaces) from n8n with the HTTP Request node and the Cofferdock API. Great for publishing content automatically to a CMS.
How to split a PDF in Make (by page ranges)
Split a PDF into several files by page ranges in Make with the HTTP module and the Cofferdock API. Great for splitting invoices or dossiers into individual documents.
How to split a PDF in n8n (by page ranges)
Split a PDF into several files by page ranges from n8n with the HTTP Request node and the Cofferdock API. Great for splitting invoices or dossiers into individual documents.
How to turn data into a chart: Excel, Google Sheets or automatically
How to turn a list of numbers into a chart in Excel or Google Sheets in a minute, save it as an image, and automate it when the data changes every day.
URL to PDF in n8n: Save Any Web Page as a PDF with One Node
Save a web page as a PDF in n8n with the HTTP Request node: setup field by field, layout options, how to hide a cookie notice, and fixes for common errors.
How to validate an email in Make (HTTP module)
Validate an email's format and domain (MX) in Make with the HTTP module and the Cofferdock API. Filter out fake leads before they reach your CRM.
How to validate an email in n8n (format and MX, one node)
Validate an email's format and domain (MX) from n8n with the HTTP Request node and the Cofferdock API. Filter out fake leads before they reach your CRM.
How to validate an IBAN in Make (HTTP module)
Validate an IBAN's checksum in Make with the HTTP module and the Cofferdock API. Check bank accounts before triggering a SEPA payment.
How to validate an IBAN in n8n (one node)
Validate an IBAN's checksum from n8n with the HTTP Request node and the Cofferdock API. Check bank accounts before triggering a SEPA payment.
How to validate a phone number in Make (HTTP module)
Validate and format an international phone number in Make with the HTTP module and the Cofferdock API. Filter out fake phone numbers and normalize the format.
How to validate a phone number in n8n (one node)
Validate and format an international phone number from n8n with the HTTP Request node and the Cofferdock API. Filter out fake phone numbers and normalize the format.
How to add a watermark to a PDF (text or logo)
How to add a watermark to a PDF with your logo or text like DRAFT or CONFIDENTIAL: where to place it, how to keep it subtle, and how to apply it across several pages at once.
Website to Markdown: 6 Ways to Convert a Web Page to Markdown (with Code)
Convert any web page to clean Markdown: Jina Reader, Python, Node.js with Readability, n8n, Zapier and an API, with code, limits and common problems.
What is MCP, and why your AI assistant can now use real tools
MCP (Model Context Protocol) is what lets an AI assistant do things, not just talk about them: generate a real PDF, take a screenshot, create a QR code, inside the same conversation. How it works, and how to try it with a tool that's actually live.