Can't highlight text in a PDF? Discover the common causes, such as scanned documents, restrictions, and conversion errors, along with the best fixes.

If you can't highlight text in a PDF, the document may contain scanned images, restricted permissions, conversion errors, or other issues that prevent text selection and annotation. This can make it difficult to review documents, add comments, and collaborate with others.

In this guide, we’ll show you how to identify the cause of the problem and apply the most effective solutions. We’ll cover how to check whether a PDF contains selectable text, common reasons highlighting does not work, practical fixes for each issue, and tips to prevent text-selection problems in future PDFs.

You can check whether a PDF has selectable text by attempting to highlight text or searching for words within the document.

Common fixes include running OCR on scanned PDFs, removing document restrictions, reconverting the file properly, and trying a different PDF reader.

Additional solutions include turning off read-only mode, updating your PDF software, repairing a corrupted PDF, and verifying that the content is not image-based.

You can prevent future highlighting issues by reviewing PDFs before sharing, maintaining consistent PDF creation practices, and ensuring documents are configured for text selection and annotation when needed.

How to Check If Your PDF Has Selectable Text

A quick way to check whether your PDF contains selectable text is to open the file and try highlighting a few words with your cursor. 

and search for a word that appears in the document. If you can find matching text using this function, the 

 and text-based. On the other hand, if the text can’t be highlighted, copied, or searched, your PDF may not contain selectable text and could be a scanned image.

7 Fixes for Not Being Able to Highlight Text in a PDF Document

If you can’t highlight text in a PDF, the file may be a scanned image, protected by security settings, opened in the wrong viewing mode, or corrupted. That said, let’s examine the seven most common fixes in case you can’t highlight text in a PDF.

#1. Convert Scanned PDF to Editable Text (OCR Solution)

One of the most common reasons you can’t highlight text is

While the document looks like it contains text, the words are stored as pixels rather than searchable characters, making text selection impossible.

 analyzes the scanned pages and converts the visible text into machine-readable characters. Once processing is complete, you can search, copy, and highlight content normally.

If you need to enable text selection in a PDF, apply OCR since it’s usually the most effective solution. After conversion, 

 and test if the text can be selected and copied.

In some cases, you can’t highlight text due to

, which can block highlighting in two ways. Some documents require a password just to open, while others can be opened freely but have 

 that prevent content selection or annotation.

If you can open the PDF but can't highlight, the issue is a permission restriction. Check whether the document has permission restrictions that block annotations or text selection. If the document requires a password to open, you can use our 

 tool. Here’s how to do it step by step:

Go to our unlock tool and upload your PDF or use the drag-and-drop option.


Go to our unlock tool and upload your PDF

Enter the correct key and click Remove the password

Wait for the tool to remove the password and click 

Wait for the tool to remove the password and click Continue

Once you gain access, try highlighting the text again

Sometimes, the issue is not with the PDF viewer or document permissions but with 

Poor conversion settings can flatten text into images, corrupt text layers, or create formatting issues that prevent highlighting from working correctly.

To fix this, return to the original file and 

. Make sure the conversion process preserves the document's text layer rather than saving each page as an image. You can achieve this with one of pdf.net’s online converters.

For example, if you made your PDF from an original Word file, you can use our 

 to recreate it. Here are the steps to follow:

Open the converter and upload or drag-and-drop your Word document.


Can't highlight text in PDF - Reconvert the PDF Properly

Wait for the conversion to finish and click 

Wait for the conversion to finish and click Download PDF

, or highlighting features, which can make it seem as though the PDF is not working correctly.

If you're viewing PDFs directly in a browser tab, downloading the file and opening it in a dedicated 

 may recognize the document's text layer and provide better support.

If you can't select text in your PDF using one reader but the same file works in another, the issue is likely software-related

rather than a problem with the PDF itself.

If you can’t copy text from PDFs that appear normal,

 may be the cause. When this mode is enabled, 

highlighting tools may appear unavailable

 even though the document contains selectable text.

. For example, PDFs downloaded from the Internet, received as email attachments, or distributed by organizations may open in a protected mode to prevent unauthorized changes or potentially harmful content from running within the file.

Check your PDF reader for options such as "Read-Only," "Protected View," or similar security settings. If you have permission to modify the document, 

switch to a standard viewing or editing mode and reopen the file. 

Once the restriction is disabled, try selecting and highlighting text again.

Outdated PDF software can sometimes cause highlighting tools to malfunction. Older versions might have bugs, compatibility issues, or limited support for newer 

, making it difficult to interact with certain documents.

Check whether an update is available for your PDF reader or editor and 

Software updates often include bug fixes and improvements related to annotations, text recognition, and document rendering. After updating, 

A damaged or partially corrupted PDF can 

prevent text from displaying or functioning correctly. 

Even if the document appears normal at first glance, issues within the file structure may interfere with text highlighting tools.

Try downloading the PDF again, requesting a new copy from the sender, or opening a backup version if one is available. You can also use a 

to rebuild the file structure. Once the repaired PDF is saved, test whether text can be highlighted.

To avoid future issues with PDF text selection and annotation, keep these six tips in mind:

. After creating a PDF, try selecting and highlighting a few lines of text. Catching a problem early is much easier than troubleshooting it after the file has been distributed.

Keep scanned and digital PDFs organized separately

 are more likely to experience text-selection issues than text-based ones. Knowing which files originated from a scanner can help you apply OCR before problems arise.

Review PDFs after major edits or conversions

. Text layers can sometimes be affected when documents are merged, compressed, exported, or converted between formats. A quick review helps confirm that highlighting and text selection still work as expected.

Establish PDF standards across your organization

, use consistent tools and export settings. This reduces the risk of generating files with incompatible formatting or missing text layers.

. Retaining the original Word, PowerPoint, or design file makes it easier to 

 if text-selection problems are discovered later. It also reduces reliance on editing or repairing the PDF itself.

. Documents that are stored for long periods may eventually be accessed by new software or users with different needs. Checking important files occasionally helps ensure they remain searchable, selectable, and ready for annotation.

Make PDFs Searchable, Selectable, and Easy to Annotate

Convert scanned PDFs into searchable text, create properly formatted PDFs, and prepare documents for highlighting, commenting, and collaboration with pdf.net.

 to keep your documents safe. Spend less time troubleshooting PDF text-selection issues and more time getting the work done.

Upload your file, mark key sections, adjust formatting, and more—no downloads needed.

Edit, Annotate, and Organize Your PDFs in Seconds

If you can’t highlight text in a PDF, the issue is usually caused by scanned content, document restrictions, conversion errors, software limitations, or file corruption. Fortunately, most of these problems can be resolved without recreating the document from scratch.

Start by identifying whether the PDF contains selectable text, then work through the relevant fixes until highlighting functionality is restored. Taking a few preventive steps when creating, sharing, and managing PDFs can also help you avoid similar issues in the future. With the right tool, like pdf.net, your PDFs can remain searchable, selectable, and easy to annotate.

#1. How do I enable text selection in a PDF?

To enable text selection in your PDF, first determine whether the document contains actual text. If the file is image-based, 

 to create a searchable text layer. You should also 

Not all PDFs can be made editable without preprocessing. Some files contain scanned images, restricted permissions, or flattened content that must be processed first. In these cases, 

#3. How to unlock a PDF for highlighting?

To unlock a PDF for highlighting, review the document's security settings and determine whether annotations or text selection are restricted. If you have authorization from the document owner, you can 

Why You Can’t Highlight Text in a PDF: Common Issues and Easy Fixes

Learn what to do when your fillable PDF isn’t working, what the common causes are, and how to make any form easily editable.

If your fillable PDF isn’t working, the issue may be 

 the owner’s restrictions and permissions

. In many cases, the problem can easily be solved by redownloading the document or using an online editor, such as pdf.net, to complete it.

To help you, we’ll explain what to do when you can’t fill out a PDF form, as well as how to convert any form into a fillable format. Read on to learn more.

If your fillable PDF isn’t working, check whether it’s flattened, whether you’re using the right type of reader, and whether it has any restrictions. Also, make sure to open it on your desktop and redownload it if necessary.

Even PDF forms that aren’t editable can become such if you use an online editor, like pdf.net, to add clickable form fields.

A fillable PDF is easy to recognize because of the interactive fields you can click on and easily type in.

Here are a few things you should try if you can’t edit a fillable PDF form:

Download the file instead of viewing it online.

Open the form in dedicated software, like Adobe Acrobat Reader, not a browser.

Check for updates for Adobe Acrobat by going to 

Check if the form is read-only. Right-click on the file, go to 

Make sure the security settings allow filling out the form. Go to 

Use pdf.net to type on flattened fillable PDFs.

Why Your Fillable PDF Is Not Working: 5 Potential Causes and Fixes

 isn’t working, the cause may be that it’s 

the form is broken or corrupted, your device has limitations

Here’s a quick overview of each cause and the most common fix:

Now, let’s take a look at what to do when you’re unable to fill out a form in more detail:

Even if the form looks fillable at first glance, it may not actually be 

. In that case, the fields you see aren’t interactive at all; they behave more like images than form elements.

The simplest thing you can do when a form isn’t actually fillable is to 

 in the spaces where the interactive fields should be. That way, the result will be exactly the same as if it were fillable.

This is where pdf.net is particularly useful; as one of the 

, it allows you to add text to any document with ease. Here’s specifically how:

Drag and drop your file into the box, or click 

, then on the area where you want to type.


Click on Text, then on the area where you want to type

Download button at the top-right corner of pdf.net editor

Sometimes, your fillable PDF works just fine until you open it in a specific viewer, and the fields suddenly become unclickable. This is 

usually the case with browser-based readers

, like Chrome or Safari for Mac, which don’t always support interactive elements.

There are several simple things you can do if you encounter this problem:

, like pdf.net, which supports fillable fields.

 if you’re on a Mac; this free, built-in tool is ideal for viewing and editing PDFs.

If the problem persists, you may have to download a new program version or consider other possible causes.

Your fillable PDF may not be working because the form itself is broken or corrupted. When this happens, you’ll likely get 

error messages when you try to open or edit it

, even though your PDF reader works fine with all other forms.

If the form itself is the problem, you can try going to the source and 

. The corruption might have occurred because your connection was interrupted, in which case re-downloading should fix the issue.

If that doesn’t help, follow these steps:

This will save a new, uncorrupted version of your document. However, it will also be flattened, so you’ll have to 

If your fillable PDF isn’t working on mobile but is working elsewhere, the issue may be simply that it’s 

not compatible with the reader you have on mobile

. This isn’t unusual; most people use default PDF apps for mobile, and these are typically designed for viewing, not editing and filling out forms.

Make sure you’re using the correct software; if you must fill out a form on your mobile, use an 

download the Adobe Acrobat app with appropriate features

. Otherwise, wait until you have access to a desktop and finish your editing there.

The reason your PDF form isn’t working as intended may be that 

certain actions are restricted by the owner

. They may not want everyone to have access to the form or fill it out without permission, so they may lock the document with a 

First, check the security settings to see what actions are enabled. If you receive a password prompt as soon as you click on the file, the document is fully locked, not just restricted.

If you have the password, the solution is quite simple:

Upload or drag-and-drop your fillable PDF

Type in your password in the dialogue box to remove it

 button. This will give you full access to all the document’s features, including interactive fields.

If you don’t have the password, the process may be more complicated. Remember that the owner protected the document for a reason, and it may be considered a 

In case of editing restrictions, you can bypass the issue by 

, as suggested for corrupted files. However, once again, you’ll have to use our 

Practically any PDF can become fillable if you have the right tools. For instance, Adobe Acrobat has a feature called 

 that can detect form fields and turn them interactive automatically.

 tool, so you’ll have to purchase a full subscription to do that, which certainly isn’t cheap. So, a 

, which allows you to add text fields manually.

Open your PDF form in our editor as described above.


Click on the Field button in the top ribbon

 from the toolbox. You can also choose a 

Add a Text Field or Signature field from the toolbox

Click on the field and start typing on your PDF

check whether the form you need to fill out is available there

. If so, open it from there and type on it directly, without having to add form fields or anything else.

Some of our forms are compatible with our 

, too, so you can simply upload the required documents and have the AI complete the form for you.

To check if a PDF is fillable or not, open it in a compatible viewer (Adobe Acrobat, pdf.net), and 

. Hover over them with your cursor; if it changes to a text cursor, you can type directly into the field. Click on the field, and you’ll see that it’s interactive.

Open your fillable form in our PDF editor and complete it in just a few minutes!

Fill Out Your Forms Online Instantly

If your fillable PDF isn’t showing text or isn’t working in general, you may have trouble completing your forms properly. This can be very frustrating, but luckily, the tips we’ve listed in this article should solve this issue quickly.

And if you don’t want the hassle, visit our PDF Forms page, where you’ll find common legal, administrative, financial, and 

, as well as many others. These are all instantly fillable and downloadable!

#1. Why can’t I type in a fillable PDF?

If you can’t type in a fillable PDF, the issue may be that it’s not actually fillable; rather, it just looks like it, but all the 

layers and interactive elements are flattened

. In this case, the PDF is more like an image of a form than a real form, so you can add text over the layer, not type directly into it.

Your PDF may not work in Chrome because of a 

, conflicting extensions, or improper settings

. Try different fixes, like disabling extensions, reinstalling the program, and ensuring that Chrome is set to display your PDFs in the browser.

#3. Why won’t my fillable PDF save my data?

Your fillable PDF may not save your data because you’re using the browser to fill it out, or the special permissions to allow saving aren’t activated. If it’s the former, download your document and open it in the dedicated software on your computer. However, in the latter case, the form’s creator must enable 

 rights first. You can flatten the PDF to bypass this, though.

opening it in our Unlock tool and typing the password in when prompted

. You may have to contact the document owner if you don’t have a password. On the other hand, if you can open the file but can’t fill out the boxes, the best option is to either remove restrictions if you have the credentials or flatten the document and use our editor to add text.

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Compare the best iLovePDF alternatives for editing, signing, converting, and managing PDFs, including pdf.net, Smallpdf, Foxit, Sejda, and more.

Many users start searching for iLovePDF alternatives because of pricing concerns, daily processing limits, ads, or the need for more advanced document workflows. Several popular substitutes solve these issues, including pdf.net, Smallpdf, Foxit PDF Editor, Sejda PDF, Wondershare PDFelement, and pdfFiller.

While some users need AI-powered PDF tools, faster processing, or better collaboration for teams, others want a simpler interface or support for large files. To help you, we compare the best iLovePDF alternatives based on editing features, ease of use, and overall workflow support to help you choose the right PDF tool for your needs.

Many users look for an iLovePDF alternative because of file limits, restricted free features, ads, and the need for more advanced workflows or AI-powered tools.

Browser-based options like pdf.net, Smallpdf, Sejda PDF, and pdfFiller are popular for accessibility and quick setup.

There are also desktop-based alternatives like Foxit PDF Editor and Wondershare PDFelement.

The right choice depends on your budget, workflow complexity, collaboration needs, and the features you use most often.

 Users can run into daily processing limits and file size caps that interrupt workflows, especially when handling larger PDFs or multiple files in one session.

ads and upgrade prompts can become distracting

 unless you move to a paid plan. Premium-only features like expanded AI credits, advanced editing, and higher processing limits may also feel restrictive for growing teams.

There are several scenarios when an iLovePDF alternative might be the best solution, for example:

, onboarding forms, or proposals may need unlimited document processing, reusable 

 can hit limitations when working with large lecture slides, scanned textbooks, or research documents that exceed free upload caps.

 may simply want fewer interruptions, fewer ads, and more flexibility without paying for a subscription.

Top 6 iLovePDF Alternatives for Small Businesses and Everyday Users

The best iLovePDF alternatives combine a user-friendly interface, fast onboarding, essential editing and e-signature features, 

, secure file handling, and affordable pricing. Adobe Acrobat was not included because this comparison focuses on lightweight and SMB-friendly alternatives with simpler workflows and lower entry costs.

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