#ao3 userscript

What it does: As you're scrolling through the fic, a comment box remains visible so you can write up your comment as you read

Found by @inahc3 at tumblr (thanks for the ping!), created by schildpath

While reading, you don't want to wait until the end to start praising the work but you also don't want to keep scrolling down to the comment box and lose your place?

Install ⇒ Floaty Comment Box (Responsive)

We've listed similar scripts before, and this one's goal is to work specifically on mobile. It also tries to match your AO3 skin to blend in better.

At the top of the page, you'll have an icon to open the comment box:

It shows at the top as well, with buttons to quote highlighted text, change settings, and you can toggle it away again at any time to get the reading space back.

Whatever you type is copied into AO3's "real" comment box at the bottom of the work, and to post it, you have to hit the "Comment" button there.

This userscript automatically hides fics where the primary pairing is not the first listed tag.

Neeve's script does the same thing, except it needed to be manually edited to make it work. I made a few edits to make it automatic if you are on a ship tag page, no code editing needed.

[INSTALL HERE] (Requires Tampermonkey or any other userscript manager)

Other features (needs manual configuration):

Add more than one preferred pairing

Show works where pairings are in the first X number of tags

On a character tag page, automatically show works that have the character in the first five tags (experimental)

Add more than one preferred character

Show works where characters are in the first X number of tags

What it does: Adds buttons for “Mark for Later”, “Subscribe” and “Download” to work blurbs while you’re browsing

Found at: GreasyFork by escctrl

It’s late, you’re browsing through your favorite tags for a short bedtime story, yet all you find are amazing-sounding epics. Mark for Later, right? Or you stumble upon a WIP that you want to read once it's completed, and want to subscribe. Or you're going through your bookmarks to download them for safekeeping.

Well, except you always have to open the work to click those buttons… Annoying.

Install ⇒ AO3: Mark For Later, Subscribe, Download from work lists

Now you have handy buttons right there in the work blurb, and can still choose which file format you want for downloading.

It doesn't know which works you've already marked for later or subscribed to, but if you're on your Marked For Later page, you'll have a "Mark as Read" button instead to quickly remove items again.

[ If this seems familiar, you're remembering correctly: this blog featured a script to add the "Mark for Later" button before. Unfortunately it and similar other scripts have stopped working after AO3 made some code changes in September 2025. You can use this as a replacement. As a bonus, unlike the predecessors, this script doesn't jump to the top of the page after you clicked a button. ]

What it does: Forces the autocomplete to stay open even if you click outside of it

Found at: GreasyFork by Oracle of Delphi

Does it annoy you that the autocomplete always disappears when you click anywhere else, and the suggestions need to reload when you click back into it? Then this script is right for you.

Install ⇒ AO3: Search Dropdown Stays Put

Now the list of suggestions stays visible, even if you click outside of it. To make it go away without picking a suggestion, you select the textfield, and press the Esc key or remove the text you entered.

What it does: Adds a Download button to the work blurb while you’re browsing

Found at: GreasyFork by tuff via ao3commentoftheday's post

You're downloading works en masse to read offline or on an eReader, let's say as preparation for a long flight or vacation, but you always have to open the work to click the button… that's a lot of clicking around and it's easy to get lost in the tabs.

Install ⇒ ao3 download buttons

Now you have a handy Download button right there in the work blurb, and can still choose which file format you want.

What it does: When you try to leave kudos again, it automatically posts a comment instead.

Found at: Tumblr by @honestlyvan

One of the saddest things you'll see on AO3 is the message that you've hit the Kudos button before:

It's one of the reasons why hits-to-kudos ratios can be very misleading. Hits count up when the same person revisits the work over and over. But they cannot give more kudos.

For creators on AO3, even years or decades after posting something, it's beautiful to see people enjoying it enough to keep coming back to it. So... what if you could let the author know that you've just re-read the fic and still love it, but without the anxiety of figuring out what to say? What if it was still as easy as a kudo: the click of a button?

Install ⇒ AO3 Rekudos Converter

When you hit kudos on muscle memory alone, although you've already left kudos before, the script will automatically send a comment instead. You don't even have to think about it!

The messages are customizable, so you can give them your own personal (or fandom-related) touch. And you can configure several messages from which it'll pick one at random, because variety is the spice of life.

An ongoing list of all userscripts featured on this blog so far.

What it does: Above the comment textbox, adds buttons which will insert HTML code to format text (italics, bold, underline, etc), to insert links or images, or even custom text. It also shows a preview of the comment.

Found at: GreasyFork by escctrl

Typing HTML by hand is a drag. Especially if you're just trying to get your squee on in the comments. That's something the Comment Formatting Options script addressed wonderfully, by letting you insert the HTML at the push of a button. But it hasn't been updated in years to make fixes or improvements, such as the ideas its author dusty had noted on its GreasyFork page.

Recently, a different script was published, which takes dusty's to the next level and adds several nifty features.

Install ⇒ AO3 Comment Formatting and Preview

The smaller new features are additional formatting buttons for lists and paragraphs. As before, you can highlight text within your comment and then click the button, to insert the HTML around it.

And the buttons now show reliably on Inbox messages, while replying to comments, and while editing comments.

The more noticable addition is that there's a GUI for configuration!

Go to any page that has comments, for example by opening a work, or viewing your Inbox (if you have an Ao3 account). In the top menu, there'll be a "Userscripts" option, with a "Comment Formatting Buttons" entry.

In the top section of the GUI, you can pick which of the buttons you want to see or hide, if there are some you'll never use anyways.

At the bottom, you can add your own custom buttons. Follow the step-by-step guide in the GUI. One thing to remember when you pick the icon is that this only works with Font Awesome v4 (which has a limited set of icons available), not with the new v5. So make sure to stay on the v4 page when you pick something.

When you chose an icon, copy its four-letter Unicode into the first field in the script GUI. Then it shows up on your custom button.

The other obvious new feature is that you'll have a Preview field, which'll show how the comment will look like once it's been posted.

... And as far as I can tell, it works nicely on mobile devices. \o/