SerpApi.Org
Whether it’s productivity tools, media managers, or game servers, I stick to free and open-source apps as much as possible. After all, they’re completely private from the prying eyes of random companies, and I don’t have to spend dozens of dollars on monthly subscriptions to unlock essential features. With containerized images, I can even host FOSS tools on a server node and access them from the rest of my devices.
File conversion utilities are one of these containerized tools that I can’t live without. Unfortunately, file conversion tools usually support a specific type of file format. So, I ended up running a bunch of file converters to format my ebooks, videos, spreadsheets, audio files, and other documents. In all fairness, managing multiple file conversion utilities is still better than relying on their cloud counterparts. But after running into ConvertX while doomscrolling on GitHub, I’ve finally deployed an all-in-one file converter that satisfies all the document formats I use for my productivity tasks.
I avoid online file converters like the plague
Lack of privacy, paid features, and long load times forced me to set up local-only solutions
For folks wondering why I have such a strong stance against cloud-based file conversion tools, I’ve got plenty of reasons to back up my hatred for them. On the privacy front alone, file converters that work from external servers are a big no-no for my productivity tasks. Even if some platforms claim to delete my data after a specific time frame, the fact that I often work with embargoed documents and confidential product releases means I can’t just upload them to the cloud. The same applies to the banking documents, invoices, academic records, and other personal files that I wouldn’t want to expose to some random company’s servers.
Then there’s the freemium nature of online file converters, where batch processing, high-speed encoding, and other useful features get locked behind a paywall. I’ve also got the storage cap to contend with, as most of these tools limit the file size of my documents, and it’s especially annoying when I need to convert high-resolution photos on my smartphone to some obscure format. Likewise, if I want to bulk-convert some lecture notes, I’d often have to run them through the file converters manually.
Worse yet, I’ve had some file converters (specifically those centered around PDFs) automatically watermark my documents with ugly logos, and I’d have to pay them extra bucks just to remove them. Or, get forced to register on their platforms, which causes a single 2MB spreadsheet conversion to take well over a few minutes. And that’s before I even mention the long queue times on some of the popular options, which is a royal pain for bulk-conversion tasks.
ConvertX is my preferred self-hosted file conversion tool
It supports hundreds of file types without invading my privacy
When I dove into the containerization landscape, I began deploying tools that cater to a specific file format, and these include everything from BentoPDF (which, granted, has other features besides changing file extensions) to ImgCompress and good ol’ FFmpeg. But as it turns out, ConvertX works with a plethora of formats, ranging from spreadsheets, text files, ebooks, and images to 3D files, LaTeX docs, AVIF codecs, and even contact formats. Since it’s completely self-hosted, all the processing operations occur on my server, thereby getting rid of my privacy, pricing, and storage limit woes.
Heck, ConvertX can even inter-convert bulky video files worth a few terabytes within a few minutes, which is pretty impressive considering that its self-hosted rival, Vert, needs an additional Docker container to change video formats. Essentially, ConvertX wraps a bunch of file converter services, including those available on Caliber, Libre-Office, and Inkscape, within a neat web UI. Swapping between them is as simple as selecting the right conversion tool, and even though there’s a bit of an overlap between some utilities, ConvertX’s minimalist interface makes swapping between the file converters fairly intuitive. I also like how ConvertX maintains a log of my converted files, especially since the app supports multiple users.
Docker makes it easy to get a ConvertX server up and running
Despite being one of the most convenience-enhancing tools in my self-hosted arsenal, ConvertX is fairly easy to deploy, especially since it meshes well with the beginner-friendly Docker. In fact, the app's official GitHub package includes Docker Compose configs and docker run commands to get the container up and running. I’ve used the former to deploy a ConvertX instance, though I had to configure a couple of environment variables. Since I want to access ConvertX from every system in my household, I enabled the HTTP_ALLOWED variable by removing the # operator before it and tweaking its value to true. I also generated a random 32-character JWT_SECRET variable using openssl rand -base64 32. With one final docker compose up -d command, I was able to get my ConvertX server operational, and it has been an essential part of my FOSS toolkit ever since.
