How to Tag Threads in the Perplexity Library

When you save conversations in Perplexity, they land in your Library. Without a system, finding a specific thread among dozens or hundreds of saved searches becomes slow. Perplexity provides tags to label threads by topic, project, or priority. This article explains what tags do, how to apply them on desktop and mobile, and how to avoid common tagging mistakes.

Tags act like folders that can hold multiple threads at once. Unlike a single folder structure, a thread can carry several tags. This lets you cross-reference topics without duplicating the thread. You can tag a thread about Q4 sales data with both “Sales” and “Q4” for fast retrieval later.

You will learn the exact steps to add, edit, and remove tags in the Perplexity Library. You will also see how tags behave when you share threads and how to search by tag.

What Tags Do in the Perplexity Library

Tags are labels you attach to threads. They work like hashtags on social media. A thread can have zero tags or many tags. Tags do not affect the content of the thread. They only help you organize and find threads faster.

Tags are private by default. When you share a thread via a public link, the tags do not appear to the viewer. Only you see your tags in your own Library. This keeps your organizational system hidden from collaborators or readers.

You can create a new tag simply by typing it. Perplexity does not require you to predefine a list of tags. If you type “Marketing” on one thread and “Marketing” on another, both threads share the same tag. The system matches exact spelling and capitalization. “Marketing” and “marketing” are treated as two different tags.

To use tags effectively, plan a naming convention before you start. For example, use “Client-A” instead of “client a” or “A-client”. Consistent naming prevents duplicate tags that hold the same meaning.

Steps to Tag a Thread on Desktop

The desktop web interface at perplexity.ai offers the most straightforward tagging workflow. Follow these steps:

1. Open the Perplexity Library
   Click the Library icon in the left sidebar. It looks like a small folder or book icon. Your saved threads appear in a list sorted by date.
2. Select the thread you want to tag
   Click on the thread title. The conversation opens in the main panel.
3. Locate the Tags field
   Look at the top of the thread panel, just below the thread title. You will see a line that says “Tags” with a small tag icon or a placeholder text like “Add tags”.
4. Type your tag name
   Click inside the Tags field. Type the tag you want. For example, type “Research”. Press Enter or comma to confirm the tag. The tag appears as a small blue or gray chip.
5. Add more tags if needed
   Repeat step 4 for each additional tag. You can add as many tags as you want. Each tag occupies its own chip.
6. Remove a tag
   Click the small X icon on the tag chip. The tag is removed from the thread but remains available for other threads.

Changes save automatically. You do not need to click a Save button. The tags persist until you remove them.

Steps to Tag a Thread on Mobile

The Perplexity mobile app for iOS and Android supports tagging. The interface differs slightly from the desktop version. Use these steps:

1. Open the Perplexity app
   Tap the Perplexity icon on your home screen. Make sure you are logged into your account.
2. Go to the Library tab
   Tap the Library icon at the bottom of the screen. It is usually the second icon from the left.
3. Tap the thread you want to tag
   Scroll through your thread list and tap the one you need. The thread opens in full screen.
4. Tap the three-dot menu
   Look for the More button, often represented by three vertical dots or a horizontal ellipsis. It is usually in the top-right corner of the thread view.
5. Select Edit Tags or Tags
   From the pop-up menu, tap “Edit Tags” or “Tags”. A text field appears.
6. Type your tag and confirm
   Enter the tag name. Tap Done or the checkmark icon to save. The tag appears on the thread.

On mobile, you can also tap directly on the Tags area below the thread title if the app version supports it. The behavior varies by app version. If you do not see a Tags field, use the three-dot menu method.

How to Search by Tag

Once you have tagged multiple threads, you can filter your Library to show only threads with a specific tag. This saves time when you are looking for a particular project or topic.

1. Go to the Library search bar
   At the top of the Library page on desktop or mobile, you will find a search bar.
2. Type tag: followed by the tag name
   For example, type “tag:Research” without quotes. The search results show only threads that have the tag “Research”.
3. Combine with other keywords
   You can type “tag:Research quarterly” to narrow further. The search looks for threads tagged “Research” that also contain the word “quarterly” in the thread title or content.

The tag: prefix works only in the Library search bar. It does not work in the main Perplexity search bar that queries the web. Make sure you are inside the Library when using this filter.

Common Tagging Mistakes and How to Avoid Them

I type a tag but it does not appear

If you press Enter and the tag does not show, you may have typed a space before the tag name. Tags cannot start with a space. Delete the leading space and try again. Also, verify that you are in the correct field. The Tags field is separate from the thread title field.

My tags are not searchable with the tag: prefix

The tag: search is case-sensitive. If you tagged a thread as “Budget” but search for “tag:budget”, the search returns no results. Use the exact capitalization you used when creating the tag. To see all your tags, scroll through your Library and note the tag chips that appear on threads.

I accidentally added a tag to the wrong thread

Open the wrong thread and click the X on the tag chip to remove it. Then navigate to the correct thread and add the tag there. There is no batch edit function. You must edit each thread individually.

Tags disappear after sharing a thread

This is expected behavior. Tags are private. When you generate a shareable link for a thread, the recipient sees only the conversation content. They do not see your tags. If you need to communicate the tag to a colleague, mention it in the shared message or include it in the thread title.

Perplexity Free vs Pro: Tagging and Library Features

Feature	Perplexity Free	Perplexity Pro
Number of saved threads	Unlimited	Unlimited
Tag creation and editing	Yes	Yes
Tag-based search (tag: prefix)	Yes	Yes
Tag visibility to others when sharing	No (private)	No (private)
Advanced library filters (date, model)	No	Yes

Both Free and Pro accounts support unlimited tagging. The main difference is that Pro users can combine tag filters with date ranges and model filters. For example, a Pro user can search “tag:Research date:last7days” to see only threads tagged Research from the past week.

You can now tag threads in the Perplexity Library using the Tags field on desktop or the three-dot menu on mobile. Use the tag: prefix in the Library search bar to filter threads by label. For a clean tagging system, decide on a naming convention before you start. An advanced tip: combine the tag: filter with a date range by typing “tag:ProjectX date:thisyear” to narrow results even further.