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May 25, 2026
Optimize PDF Size for Smartphone Gratis
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Every PDF tool you need to get documents done paper-free
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.
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.
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.
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.
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.
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.
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4M
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Cloud-native PDF editor
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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:
Am new to PDFfiller so here are some initial comments:
1. an "undo" button would be nice
2. when sharing a document and adding comments/instructions, it would be helpful to have the option to pull up the document to be shared for reference.
2014-07-01
It seems to be the one site that I can get that document or contract completed when I cannot find it anywhere else on the Net. I always end up at this site at ridiculous hours so Thank you PDFfille
2017-11-22
Helpful Tool
I had been trying to send off some release forms and was crunched for time so I signed up for PDFFiller's free trial. In the end, I wasn't able to use their software without a purchase, but it made me almost wish I had paid the money.
I like that I can sign any document electronically. It definitely saves time and printing costs. It cuts out about 2 extra steps: printing and scanning. This is helpful for documents that need signatures such as release forms, etc.
I didn't like how much I had to pay in order to use my e-signed pdf. I don't use the software often enough to make it worth the price.
However, if I worked regularly with documents that needed to be signed this software would be the very best solution.
2019-08-06
Amending the future
The software is designed to edit PDFs. Makes updating documents and personal files very easy.
I wouldn't change anything for this product.
2022-09-23
I'm working on several files for which I need to be able to type in the answers as my hands have arthritis in them and that makes it difficult to write. The instructions could be a little clearer. To be honest, I'm a new widow and I wasn't thinking very clearly. I haven't taken the time to read the online instructions so my navigational issues are of my own neglect. I think you have a wonderful product actually.
2021-03-24
What do you like best?
Very great experience with editing pdf files. Helps to create a digital signature, no need to print the documents to sign them. PDFfiller does it all for you. What best is to save the paper save the environment.
Best website during such a pandemic situation, while working at home.
What do you dislike?
There is just one problem that it just provides limited font styles. Please provide more font options and some more features like double spacing etc.
Recommendations to others considering the product:
It is the best website if you are working from home if you are an environment lover and want to save the earth by not printing paper and also save money.
What problems are you solving with the product? What benefits have you realized?
We are in the transportation business, so we have to send the documents for the Border clearance.
Earlier, we used to print the documents and then put a border sticker and write notes with a pen on it.
But, with the help of this, we are saving a lot of paper. Just upload the docs to pdffiller and copy, paste border sticker, and write notes with edit text icon. Everything is easy now.
2021-02-16
Optimize PDF Size for Smartphone Feature
Optimize PDF Size for Smartphone is designed to enhance your PDF experience on mobile devices. This feature ensures that your documents are easy to view and share without sacrificing quality. You can enjoy smoother navigation and quicker downloads, making PDF handling more efficient.
Key Features
Reduces file size for quicker sharing
Maintains document quality after compression
User-friendly interface for easy navigation
Compatible with various mobile PDF readers
Potential Use Cases and Benefits
Share large PDF files without delays during emailing or messaging
Store more documents on your smartphone without running out of space
Improve document loading times in mobile applications
Enhance mobile accessibility for on-the-go work or study
This feature effectively solves the problem of large PDF files that can hinder your productivity. By compressing your documents, you minimize loading times and ensure easier access on your smartphone. You can now focus on your tasks without worrying about file size limitations.
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
How do I optimize the quality of a PDF?
Choose File > Save As Other > Optimized PDF, or Go to Tools > Optimize PDF, and then click Advanced Optimization. The PDF Optimizer dialog box opens.
How do I reduce the size of a PDF on my phone?
Go to the Compress PDF tool. Select the red + button to import a file. Select the file thumbnail, then tap Continue. Choose your compression level.
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