Show HN: PNG to PDF Conversion in the Browser

Hi everyone, I build some "online" converters as a side project in the last weeks. The difference to existing conversion websites is, that my converters don't upload your files. Everything happens in your browser on your device (with the help of a lot of great Open Source Javascript libraries). I think privacy is an essential feature for a service like this, so my converters also don't use google analytics or any other form of tracking (in fact they use no external resources at all).

I started this because I ended up with some .heic files from my iPhone and had to use ImageMagick every time I wanted to upload them somewhere. So now there is https://heic.to-jpg.com and I can just drag and drop .heic-files there to convert them to jpg.

Next I needed to send some stuff to my accountant, so I made pictures, but he wanted a pdf. So I made https://png.to-pdf.net and I can drag and drop multiple png's and it will return a pdf with one image per page.

There are a lot of other converters that basically came free with the libraries I used, you can find them all in the sidebar (e.g. https://tiff.to-png.com).

I hope some of you will find this usefull.

Show HN: PNG to PDF Conversion in the Browser
png.to-pdf.net

For folks who need an offline tool, macOS has it in the right-click menu for most file formats under > Quick Actions.

Hey, thanks making it. Easy to use and loads fast, perfect!

Talking about .heic, recently I learned that Shortcuts app from Apple in iPhone can do a various image operation, like resizing and converting between formats.

The one I used the most is resize to smaller size since .heic is gigantic. All I need to do is setup the shortcut once [1], then I can resize any photo I took from quick actions in gallery. Bonus, it also convert the image to .png for me.

If I remember correctly, Shortcuts also support converting image to PDF, so it's pretty powerful.

Because of it, I stopped using free website for converting stuffs and just do it on the phone. But I still like your website ;)

[1] I don't remember which article I read, but this one looks like a good starting point for setting up the shortcut - https://www.switchingtomac.com/tutorials/iphone/how-to-resiz...

Hmmm, that sounds like something I'd consider upgrading up from Mojave for.

Most of these go through a canvas element, which is something a browser can "draw on". For conversion from jpg to png for example you don't need any libraries at all because your webbrowser can read and write both of these formats: "draw" jpg on a canvas and read it as png, done. For others like heic and pdf I used open source JS libraries such as pdfJS.