13 Other Ways to Say “Just to Let You Know”

So, you want to update someone with quick information. “Just to let you know” is usually a good option to do this. But is it the only choice?

This article will explore some great options for another way to say “just to let you know.” There are plenty of synonyms available for all sorts of contexts.

Other Ways to Say “Just to Let You Know”

  • As a quick note
  • Really quickly
  • Sorry to bother you, but
  • Just so you know
  • I just have to say
  • Just so you’re aware
  • So you know
  • I need you to know
  • Quickly
  • I just have to mention
  • I need to let you know
  • If you can spare a second
  • Before you go


  • “Just to let you know” is a good phrase if you want to update someone quickly, but it’s not the most formal choice.
  • “As a quick note” is a great professional alternative that sounds polite.
  • Try “really quickly” to update someone quickly in informal situations.

There are plenty of great options that can work. Keep reading to learn how to say “just to let you know” politely in different contexts.

You may also want to know more about “just to let you know.” The final section will touch on the phrase. We’ve explained whether it’s rude to use it, which might be of interest to you!

As a Quick Note (Formal)

“As a quick note” is a great formal alternative that shows you how to say “just to let you know” politely. It works well in business emails to show someone that you have a quick piece of information to share.

Generally, “as a quick note” works when emailing employees. It shows you want them to briefly give some attention to something, even if it’s not the most important thing you’re sharing in the email.

We highly encourage using “as a quick note” over “just to let you know” in professional contexts. It’s much better as it removes “just” from the phrase, which makes “as a quick note” much more formal.

Check out these examples to explain more about it:

Dear Adam,

As a quick note, can you get in contact with the Bennetts? I’d appreciate your help.

All the best,

As a quick note, I will not be in the office from Friday till Monday. I’m sorry for any inconvenience caused.

Really Quickly (Informal)

“Really quickly” is a great informal synonym for “just to let you know.” It shows that you have a small piece of information to let someone know about that shouldn’t take much of their time.

While it doesn’t explicitly announce you have something to tell someone, “really quickly” generally comes before you pass along information. Most native speakers know what comes after “really quickly” when you have something to share.

Try using it when telling your friends about something before they leave. “Really quickly” suggests that it shouldn’t take very long to explain something to them, so you shouldn’t need their attention for longer than a few seconds.

We don’t recommend using “really quickly” formally, though. Stick with “just to let you know” if you want to sound more professional.

Here are some examples to help you:

Really quickly, is there anything else you need from the store? I’m only going once more.

Really quickly, I have one ticket spare! You can come along if you’d like.

Is It Rude to Say “Just to Let You Know”?

“Just to let you know” is not rude, but it’s also not formal. You should only use it informally to let someone know information quickly.

A general rule of thumb is that if “just” appears in a phrase, it’s not the most formal choice. You should not say “just to let you know” when dealing with important information. “Just” is a bit too off-handed in professional situations.

If you do use “just to let you know,” it may take away from the impact of the information shared. It also removes your message’s urgency, which could cause issues later (especially in a professional sense).

So, you should keep it short and sweet when using “just to let you know.” For instance:

  • Just to let you know, this is the report you wanted.

If someone has asked for a report and you have nothing else to add, “just to let you know” is a great phrase to use. It’s quick and concise, allowing you to pass the report over and move on with your day.

Bookmark this page if you’re still unsure about what to say instead of “just to let you know.” After all, you can never have too many back-ups and synonyms to help you in your writing!