A payment window popped up while trying to edit a PDF
I had a document that needed to be submitted urgently. I just needed to open the PDF file and enter my name in the signature field, but every time I clicked, a window saying "Please upgrade to Premium" popped up. In the end, it was a choice between paying the monthly subscription fee or finding another way. You have likely experienced this at least once.
PDF is one of the file formats most frequently encountered in the daily lives of office workers. Contracts, reports, resumes, and even invoices are mostly exchanged in PDF format. However, if you do not know how to edit PDFs for free, you will repeatedly find yourself in situations where you are forced to make a paid payment even for a simple task. In this article, I will summarize practical methods to edit, convert, crop, and merge PDFs without spending a single penny.
There are three main reasons why PDFs are difficult to edit
Why can't PDFs be edited directly like Word files? It is not simply because there is no program available, but due to the inherent characteristics of the PDF format itself. Understanding these three reasons clarifies which tool to use.
The first reason — PDF is a format designed as 'printout'.
PDF (Portable Document Format) is designed to look the same regardless of the device or operating system on which it is opened. Fonts, layouts, and image positions are all fixed. This is both an advantage of PDF and the fundamental reason why editing is difficult. While Word files separate text from formatting information, making modifications easy, PDFs are saved as pre-completed printouts, so dedicated tools are required to change the content.
The second reason — Scanned PDFs are saved as images.
PDFs created by scanning paper documents are saved as images, not text. Although they appear as text to the eye, from a computer's perspective, they are no different from a single photograph. To edit text in such scanned PDFs, OCR (Optical Character Recognition) technology is required. There are many cases where general PDF editing tools cannot handle the task, so more specialized tools are required.
Third Reason — When editing is locked due to security settings
PDFs can have security settings applied, such as editing locks, print restrictions, and copy protection. PDF documents issued by public or financial institutions often have these settings. In this case, it is impossible to modify the content even with the best editing tools. For such documents, instead of directly editing the content, you must handle them by overlaying text or a signature on top.
There are 5 main ways to edit PDFs for free
It is fully possible to edit PDFs for free without a paid subscription. You can handle most PDF tasks by utilizing the following five tools and methods according to the situation.
Method 1. iLovePDF — Cropping, Merging, and Converting PDFs All at Once
iLovePDF (ilovepdf.com) is the most feature-rich and intuitive service among free PDF editing tools. Most features can be used for free without registration. Key features include merging PDFs (combining multiple files into one), cropping PDFs (extracting specific pages), converting PDFs to Word, Excel, or images, converting Word, Excel, or images to PDF, compressing PDFs (reducing file size), and rotating and reordering PDF pages. Its advantages include support for a Korean interface and fast speed. The free version has limitations on file size and daily processing volume, but it is sufficient for general tasks.
Method 2. Smallpdf — Strong in adding text and inserting signatures
Smallpdf (smallpdf.com) is particularly convenient for adding text, images, and signatures to PDFs. It is most useful when adding signatures to contracts or entering text into forms. The free version allows you to process up to two files per day. It also provides features for PDF conversion, cropping, and merging. It is easy to use as you can start working immediately by uploading files via drag-and-drop.
Method 3. Google Drive — Convert PDFs instantly without installation
As long as you have a Google account, you can convert PDFs into Google Docs and edit them without any separate installation. The method is simple. Upload the PDF file to Google Drive, right-click the file, and select 'Open in Google Docs' to convert the PDF into an editable document. It has a built-in OCR function that recognizes text in scanned PDFs to some extent. To save it back as a PDF after conversion, select File → Download → PDF Document. While not perfect, it is sufficient for simple text editing.
Method 4. Adobe Acrobat Reader Free Version — Performing Basic Tasks with the Official Tool
This is the official free tool from Adobe, the company that created PDFs. Unlike the paid version, Acrobat Pro, the free version (Reader) has limited editing capabilities; however, features such as commenting on PDFs, highlighting, adding text boxes, and inserting digital signatures are available for free. Using the official Adobe tool when adding signatures to official documents submitted to institutions ensures high credibility. The advantage is that it is an installable program, so it can be used without an internet connection.
Method 5. Canva — Optimized for PDF Design Editing and Rewriting
Canva (canva.com) is the most effective tool when you need to create a new PDF or edit a PDF that includes design elements, rather than modifying an existing one. When you upload a PDF to Canva, each page is converted into an editable design. You can edit text, replace images, and change colors. Once completed, you can simply download it as a PDF. It is particularly useful for PDF work where design elements are important, such as resumes, portfolios, and brochures.
Guide to Choosing the Best Tool for Each Situation
Having too many tools can actually make it confusing to know which one to use. We have organized this so you can immediately select the tool that suits the situation.
When you want to combine multiple PDFs into one, use iLovePDF's 'PDF Merge' function. Simply upload the files in order and press the merge button. You can use it immediately without signing up.
When you want to extract only specific pages from a PDF, use iLovePDF's 'PDF Split' or Smallpdf's 'PDF Crop' function. Enter the desired page number, and only that page will be extracted.
When you need to add a signature to a PDF, use Smallpdf or the free version of Adobe Acrobat Reader. You can draw directly with a mouse or upload and insert an image signature.
When you want to convert a PDF to Word, iLovePDF's 'PDF to Word' feature offers good conversion quality. If you use Google Drive, you can convert without installation.
When you need to reduce the PDF size, use iLovePDF's 'PDF Compression' feature. It is useful when the file size exceeds the email attachment limit. It reduces the file size without loss of image quality.
When you need to edit a PDF containing designs, uploading it to Canva for editing is the most convenient method. You can freely change text and images.
Online tools like iLovePDF and Smallpdf operate by uploading files to a server. For documents containing sensitive personal information, it is safer to use offline installable tools like Adobe Acrobat Reader instead of online tools. While most services state that uploaded files will be automatically deleted after a certain period, it is advisable to exercise caution with important documents.
Understand the limitations of free versions
Most free PDF tools have restrictions on the number of daily processing operations, file size, and some features. You can resolve most situations by combining multiple tools, such as using another tool when one encounters a limitation. If you are curious about free digital tools available in addition to PDF-related tools, it would be helpful to refer to Truly Free! A Comprehensive Guide to AI Tools You Can Use Right Now.
Conversion Quality Depends on the Original PDF
When converting PDF to Word, documents containing tables, complex layouts, or special fonts may experience formatting distortion after conversion. It is recommended to always check the converted result and make additional corrections as needed. Utilizing AI tools allows you to organize content and write documents more quickly after conversion. If you are curious about how to create blogs and documents using AI, I recommend checking out No Coding Needed! How to Create a Blog with AI and Upload It to Dothome for Free.
Conclusion — It Is Enough Without Paid Subscriptions
There are three main reasons why PDF editing is difficult: the fixed format characteristics of PDFs, the image saving method of scanned PDFs, and security lock settings. However, if you understand these three causes and choose the right tool for the situation, you can handle most tasks without any paid subscriptions.
For PDF cropping and merging, use iLovePDF; for inserting signatures, use Smallpdf or Adobe Reader; for text editing, use Google Drive; and for design editing, use Canva. If you remember just this combination of four tools, you won't be flustered no matter what PDF task comes your way. Let's start by bookmarking iLovePDF right now.
※ The free policies of the tools introduced in this article are subject to change, so please check the latest information on each service's official website.
