![]() Who it’s for: A viable alternative to iLovePDF, for users who want a multipurpose PDF toolkit Poor compression ratio with our sample PDF.Read: 10 Best PDF Reader Apps for Android Smartphones and Tablets We expect PDF Compressor might work better with more text-heavy files, but as it stands we suggest staying away from it. And even if AllPDF Reader is less reliable, it offers so many more additional PDF functions. Even if it’s single-purpose solution, iLovePDF just does a better job. Overall, it’s hard to recommend PDF Compressor. 89 percent reduction in size, down to 19.87 MB. iLovePDF achieved a stellar 87 percent compression ratio. Furthermore, the compression output was far from satisfactory. For starters, it took a ridiculously long 5 minutes and 10 seconds for the end to end process, from uploading the PDF to its server to compression and download. But just how well does it perform? Sadly, not as well as we’d have liked. Just like iLovePDF, it makes use of a cloud-based solution. Unlike the others in our list so far, PDF Compressor really is a single-function app. Who it’s for: Users who want a single-purpose app for PDF compression Doesn’t work with all PDF files, especially larger ones.Nevertheless, we’re holding off recommending AllPDF because its compressor doesn’t seem to handle large PDFs very well. We tried out its other features too, like JPG conversion and these seemed to work fine. AllPDF Reader’s compressor did work here, but only reduced the file size by about 10 percent, down to 508 KB. Now, at Just 559 KB, this is already a fairly optimized PDF, with just a few images and tables. It outputted black pages with no information or pictures whatsoever.Ĭurious about whether or not the option was completely broken, we tried out another test file, Tanzania’s Human Development Report, available from the UNDP website here. The test file we used did not work with the PDF Compressor. However, there is a major problem with AllPDF Reader’s compression. AllPDF Reader’s compression reduced the file size by 91 percent, down to just 1.9 MB. Compression time clocked at a mere 3 seconds. But AllPDF’s local compression solution blew us away in terms of speed. Who it’s for: Users who want a quick, offline PDF compression Privacy concerns as you have to upload PDF on cloud.The cloud-based solution can take a considerable amount of time on a slow net connection.Wide range of additional features like PDF merge and split.This took our test file from an unwieldy 20 MB to just over 2 MB. We were very impressed with iLovePDF’s compression solution: It reduced the file size by an incredible 87.5 percent. We expect the process to be much faster with a faster connection. At this speed, it took 2 minutes and 58 seconds for iLovePDF to upload the test file, compress it, and download the compressed version. We hit a usage cap on an otherwise blazing-fast 100 Mbps line and are stuck with 2 Mbps for the rest of the month. This can lead to slow compression times if you’re using slower internet. You select your PDF of choice and it uploads it to a server where the actual compression is done. For PDF conversion, iLovePDF uses a cloud-based solution. Apart from PDF compression, it also allows you to merge and split PDFs, digitally sign PDF documents, annotate them, and convert them to the JPG format, among other functions. We were impressed with iLovePDF right off the bat: It’s got a simple interface with tiles for each PDF function you want to use. Who it’s for: Users who want an all-in-one PDF kit We tested out the following PDF Compressor apps: This was done over a 2 Mbps WiFi connection. Some of the PDF Compressors required the file to uploaded to the cloud. This is a high-end 2018 Android flagship smartphone so expect real-world performance to be slower on more budget-friendly devices. The apps were tested on an LG G7, with a Snapdragon 845 processor and 4GB of RAM. We recorded both the final file size and the time it took to compress the file. We ran each app at its default compression setting-we didn’t make any changes to file format or compression quality to eliminate bias. We tested each PDF Compressor app in the same way. It brushes right up against the email attachment limit of many email clients-Gmail, for instances, caps attachments at 25 MB. At just over 20 MB, this isn’t a file that’s convenient to email. The real value of a PDF compressor is in terms of how well it can handle multimedia and this is exactly what we’re testing here. As you can see from the screenshot below, it’s got plenty of high-resolution images interspersed with the text itself. This is freely available to the public here. Our test sample is a 20.05 MB PDF of a single chapter from a high school textbook. Read: How to Remove Watermark from PDF in Three Simple Steps The Test Sample
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