Customer Reviews

Olivia
06/02/2019
AltoCompress is a great tool when it comes to reducing the size of your PDFs. I use it all the time. The whole procedure takes a few simple steps. OH, and you can also edit your PDF online.
Grayson
01/02/2019
I’m almost out of free storage space on my smartphone, that’s why I think AltoComress is very helpful. Now I can reduce PDFs and store them on my phone or save them to Google Drive in one click.
Mason
29/01/2019
I often work with scanned PDFs which sometimes exceed several megabytes in size so I’m really glad I’ve found this app. Very accurate and time-saving service. No ads, no hidden payments. Strongly recommended!
Logan
27/01/2019
I was surprised to find such a useful app, let alone a free one. What I love the most is that I can import docs from Dropbox as well as from my computer and share them with anybody I want in one click!
Mila
23/01/2019
I use AltoCompress to process image-based PDFs. I must say it’s a very precise and convenient app. An unlimited number of uploads is allowed. I’ve tried it for some really large PDF documents and it worked perfectly well.
Harper
18/01/2019
I think AltoCompress is great news for all mobile device users. I simply love the fact that it’s possible to compress any PDF and make it much smaller in size on any device. I use it on a daily basis.
Jayden
11/01/2019
I had a pretty large scanned PDF file that I wanted to reduce using various software, both web-based and downloadable, but it didn’t work well enough. Then I found AltoCompress and the problem was solved within seconds. Thank you, guys!
Sebastian
07/01/2019
I find AltoCompress a simple and accurate up-t-date tool. I’m not an expert but it seemed to work great for every PDF document I’ve uploaded. I was a little worried about the quality of the reduced file but the quality was amazing.
Ella
29/12/2018
Wasn’t expecting such high productivity from an online app. With AltoCompress, I was able to reduce a few large PDF documents and it only took me a few minutes and a few simple steps. Great service!
Adalyn
23/12/2018
You may think AltoCompress is just a simple online PDF reducer but it’s actually capable of more than that. I was able to compress a PDF and redact it afterwards in their web-based editor. Will definitely use the app more!