A tidy profile photo, a well-put-together PDF resume, and an easy way to share your contact info. Three concrete things you can fix today, for free.

Job hunting or negotiating a promotion rarely comes down to the resume alone. Before you send that first message or apply to the first opening, there's a handful of small details (an updated profile photo, a well-put-together resume, an easy way to share your contact info) that add up more than they seem to, and none of them need a designer or paid software.
Your LinkedIn profile photo is often the first impression, and it's frequently a crop from a group photo with a background that has nothing to do with anything. Removing the background and swapping in something neutral (or leaving it transparent) is a quick, free upgrade.
If your resume is printed and all you have is a phone photo of it, or a few separate images you need to send as a single document, converting them to PDF looks far more professional than sending loose photos over email or messaging apps.
Instead of reading out your email or LinkedIn profile at a networking event, a QR code pointing straight to it gets scanned with a camera and that's it. It takes a minute to set up and works everywhere afterward: an email signature, a printed card, a presentation slide.
These tools handle the mechanics. Nothing you type is saved or sent anywhere, and this and the rest of the site's free tools are at Giga Useful Tools.