We have found our experience with Zamzar over the years we have used it to be fantastic. They were receptive to a tiered pricing structure as our requirements changed, have a friendly support team that is always helpful and their API that we use daily to send documents to for conversion has always been available and had no issues.

We looked at several docx to pdf cloud based converters a couple of years back that could recreate the layouts and fonts that we used in our documents. None that we tried were able to accurately convert the documents apart from Zamzar. We had originally questioned whether the cost to use the service was worth it but when you consider the complexities of building your own solution and maintaining it we realised that the cost was largely irrelevant. We use Zamzar's developer API in order to send docx files to it and have them returned back to our software. It has been rock solid over the last couple of years with no down time. The time to convert a file is always been within 5 seconds (I think).

If we really had to nitpick, we would love it if we didn't have to poll the API to check to see when the document had been converted and instead it could be more efficient if they could provide us with a web hook (maybe this is possible and we just haven't asked!).

The service just works. We've tried other file conversion services in the past, and the results were very disappointing. With Zamzar, the results are consistently good. Also, their support is friendly and responsive.

No real cons. The product is great. If I *had* to find one con, it's the inability to have several separate api keys for different environments. I ended up having more than one account with them to accomodate this. Not a huge deal.

I decided to try their free converter. The site made me use my credit card. I tried four images and then never used them again as I had the images converted professionally. Zamzar started to charge me. I received no email bill or anything. After three months I noticed a charge on my credit card. I had to Google them as I forgot who they were even, then go to their site and sign in and manually cancel. I use software from many companies and they all send an email invoice or confirmation except for Zamzar. It is a small amount so it is under the radar. I feel it is intentional and they scam people knowing most will not notice.

It was fairly easy to use and try overall

Hidden billing, started being charged and received no confirmation email or invoice

I'm obviously a very basic user so I can't speak to any of the advanced features, but for everyday file conversion needs I can't imagine anything better. The process isn't rocket science, though other software retailers act like it is. With recent website improvements, it's hard for me to imagine switching to any other service.

I am a real estate broker, and like many people, deal with a variety of file types in my day-to-day work life. I see plenty of PDFs, JPEGs, and DOCXs, but sometimes I have to deal with TIFFs, GPXs and more, depending on what kind of research I'm doing. Unfortunately my file storage program only allows upload of a few of file types, which is how I stumbled across Zamzar. I used to have a difficult time finding a conversion program that would either a) allow a couple of free conversions (I typically don't need many) or b) allowed the file-type-to-file-type I was looking for. Zamzar solved all that. Incredibly simple to use, I have yet to find a conversion it won't perform for me. Files are processed exceedingly fast, and are easy to download, without making me hunt around for them or encountering a paywall (don't you just love that when other programs will convert a file for you, but then make you pay to download it?). Only on a few occasions have I run out of conversions, so Zamzar is largely perfect for my needs. I have also always appreciated that it works entirely online, without forcing me to download a single piece of software.

I can easily imagine that someone with far more conversion needs/volume than me would relatively quickly find themselves in need of the paid version (that said, it would probably be worth it for the speed and simplicity of use). Also -- and this is a very minor complaint as Zamzar has improved the look of their website over the years -- the interface used to be so basic looking, it raised questions about whether the technology might even be secure, or if it would function properly. (In my memory, there used to also be third-party ads hosted on the website, which looked deceptively like Zamzar's own file conversion button).

We needed a Product to upload primarily HTML content, convert and download as PDF within the context of an existing web application for a Client's business processes. Zamzar's API provided not only the Service required but easy to understand stepped-process to implement. This business process was critical - but I don't believe we ever had a failure over years of daily use.

Not a problem with the product, but had to build quite a bit around the API calls to handle timing and any issues - mostly because the use was within a web application where automation of the stepped-process was needed.