Merge Highlight Pdf For Free

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Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
Note: Integration described on this webpage may temporarily not be available.
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Last updated on Jan 16, 2026

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Edit PDF
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Instantly send PDFs for review and editing.
Merge
Combine multiple PDFs into one.
Rearrange
Rearrange pages in a PDF document.
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Compress PDFs to reduce their size.
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Convert PDFs into Word, Excel, JPG, or PPT files and vice versa.
Create from scratch
Start with a blank page.
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Upload your document in seconds
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Fill out, edit, or eSign your PDF hassle-free
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Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
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Regional Leader - Summer 2025
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Every PDF tool you need to get documents
done paper-free

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Create & edit PDFs

Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.
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Fill out & sign PDF forms

Say goodbye to error-prone manual hassles. Complete any PDF document electronically – even while on the go. Pre-fill multiple PDFs simultaneously or extract responses from completed forms with ease.
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Organize & convert PDFs

Add, remove, or rearrange pages inside your PDFs in seconds. Create new documents by merging or splitting PDFs. Instantly convert edited files to various formats when you download or export them.
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Collect data and approvals

Transform static documents into interactive fillable forms by dragging and dropping various types of fillable fields on your PDFs. Publish these forms on websites or share them via a direct link to capture data, collect signatures, and request payments.
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Export documents with ease

Share, email, print, fax, or download edited documents in just a few clicks. Quickly export and import documents from popular cloud storage services like Google Drive, Box, and Dropbox.
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Store documents safely

Store an unlimited number of documents and templates securely in the cloud and access them from any location or device. Add an extra level of protection to documents by locking them with a password, placing them in encrypted folders, or requesting user authentication.

Customer trust by the numbers

64M+
users worldwide
4.6/5
average user rating
4M
PDFs edited per month
9 min
average to create and edit a PDF
Join 64+ million people using paperless workflows to drive productivity and cut costs

Why choose our PDF solution?

Cloud-native PDF editor

Access powerful PDF tools, as well as your documents and templates, from anywhere. No installation needed.

Top-rated for ease of use

Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.

Industry-leading customer service

Enjoy peace of mind with an award-winning customer support team always within reach.

What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:
The software is excellent - really easy to use. I wasn#t sure whether to pay for something I'll only use a few times a year but decided to do so simply to save time searching for free software that probably wouldn't be as good. One minor niggle: I paid on my debit card and it took me back to the website, whereupon I had to pay again to gain access - not sure if I have paid twice or not. Would have been five stars other than for that.
Ben R
2016-04-04
It was pretty easy to use except when you hit the next tab it would take me to the text box to type but it would not allow me to type until I moved my mouse to that location and click. It would be easier if it would allow you to type in the box it moved you to so you don't have to keep going back and forth to the mouse. Also some boxes when completed there was not an option to click "next.
Bart B
2017-08-09
I really enjoy PDF filler. It is way more user friendly than Adobe Pro and it is so convenient for it to be a website that I can access from anywhere. Who ever created this is a genius!!!!!!!!!!!!
T Jones
2017-09-21
ease of use could be a little better The signature feature is wonderful. Tabbing around the form is easy. It makes signing documents very convenient instead of having to print them out and sign and fax or send back. It seems like each time I try to do something new, it costs extra. Example is signatures. Only holds 3 signatures.
julie s.
2017-11-15
My first time with this App and it seems to be a lot different to Adobe, but easier to operate. I have modified 2 pdf file successfully, and so far (as a new user), not too many 'dropped balls'.
Colin D
2024-02-12
Very quick and easy but in the end actually only needed for a one-time use so didn't make financial sense to pay further for 'just-in-case' use.
Anonymous Customer
2023-07-10
Very simple to use Very simple to use, convinient and saves alot of time. Thereare many features such as signing, initials, drawing, text to name a few. I would recommend pdffiller to anyone who would like to modify a PDF document with ease.
Ridwaan Ramjan
2023-04-10
Intuitive & straightforward This online software seems pretty intuitive to use and I've had a good experience of collecting signatures online, so far.
customer
2022-11-23
An invaluable resource for filling out forms. Incredibly fast customer service that is exceptional in handling your needs. In this day and age when companies can treat you like a number, it is nice to know that PDF Filler is not one of them. They treat their customers with respect and attention, satisfying their needs quickly and efficiently. More companies could learn from them on how to conduct business.
Surya K
2020-08-06

Instructions and Help about Merge Highlight Pdf For Free

Merge Highlight PDF: edit PDF documents from anywhere

The Portable Document Format or PDF is a popular file format used for business records because you can access them from any device. You can open it on any computer or smartphone — it'll appear same for all of them.

Data security is the key reason why do professionals choose PDF files to share and store information. PDF files are not only password-protected, but analytics provided by an editing service, which allows document owners to identify those who’ve read their documents in order to track potential breaches in security.

pdfFiller is an online editor that allows you to create, edit, sign, and share your PDF files directly from your browser tab. Convert an MS Word file or a Google Sheet and start editing it and create fillable fields to make it a singable document. Once you finish changing a document, mail it to recipients to complete and get a notification when it’s completed.

Use editing tools such as typing text, annotating, and highlighting. Add and edit visual content. Change a document’s page order. Add fillable fields and send for signing. Ask your recipient to fill out the document and request an attachment if needed. Once a document is completed, download it to your device or save it to cloud.

Complete any document with pdfFiller in four steps:

01
Browse for your document from the pdfFiller's uploader.
02
To edit the content of your document, click the 'Tools' tab and follow the instructions.
03
Add input fields if you need any; pdfFiller supports text, checkboxes, radio buttons, dropdown lists etc.
04
When you've finished editing, click the 'Done' button and save or email your document.

Merge Highlight PDF Feature

The Merge Highlight PDF feature allows you to combine multiple PDF documents while retaining highlighted sections. This makes it easy for you to manage and reference important information from different sources in a single file.

Key Features

Combines multiple PDF documents into one
Retains all highlighted areas during the merge
User-friendly interface for easy navigation
Supports various PDF formats and sizes
Allows for selective merging of specific documents

Potential Use Cases and Benefits

Ideal for students compiling research materials
Useful for professionals preparing reports
Great for project managers summarizing proposals
Helpful for legal teams organizing case documents
Beneficial for teachers consolidating lesson plans

By using the Merge Highlight PDF feature, you can save time and reduce frustration. Instead of switching between documents, you can easily access all your important highlights in one file. This streamlined approach improves productivity and helps you stay organized.

Get documents done
from anywhere

Create, edit, and share PDFs even on the go. The pdfFiller app equips you with every tool you need to manage documents on your mobile device. Try it now on iOS or Android!

For pdfFiller’s FAQs

Below is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.
What if I have more questions?
Contact Support
Highlight your PDF Left-click the mouse, hold it, and move around the page to highlight the area or text. Release the mouse button once the area or text is selected. Once the PDF is highlighted, you have the option of adding a description to each annotation, which you can do from the left vertical panel.
Highlight PDF Text Go to the “Comment” tab and select “Highlight”. Use your cursor to select the text you want to highlight. If you are looking highlight a large area of text, you also have the option of using the “Area Highlight” Button.

#1 usability according to G2

Try the PDF solution that respects your time.
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025