10 Best Autocomplete Libraries In Vanilla JavaScript (2026 Update)

If you’re looking for an autocomplete JavaScript library to enhance the select & input behaviors on web applications. You have come to the right place.

This is a hand-picked list that is updated every year and showcases the 10 best pure (vanilla) JavaScript autocomplete libraries of the year.

Feel free to download and use them in your next web app design to apply the autocomplete functionality to the existing input field or select box. Have fun with it.

Originally Published May 25 2020, updated Dec 26, 2025

1. Fast Autocomplete/Typeahead Library For Bootstrap 5

This is the upgraded version of the Bootstrap 4 Autocomplete plugin that enables a blazing-fast autocomplete/typeahead functionality on Bootstrap 5 inputs.

[Demo] [Download]

2. Powerful Autocomplete With Asynchronous Data Fetch – autocomplete.js

A feature-rich, highly-customizable, fully accessible autocomplete library written in Vanilla JavaScript.

Features:

• Supports both Single and Multiple select.
• Supports for Asynchronous Data Fetching.
• Allows you to group results.
• Allows you to add checkboxes to the beginning of the results.

[Demo] [Download]

3. Easy Autocomplete Library For Bootstrap 5 – autocompleteBS

Yet another simple and configurable autocomplete JavaScript library created especially for the latest Bootstrap 5 framework.

• Simple configuration to add autocomplete function to an input field
• Allow multiple autocompletes on the page, and the ability to add additional post document load
• Configurable Debounce, Min Input Length and Max Results to display per input
• Keyboard controls to navigate list (Up, Down, Tabbing, Escape and Enter to Select)
• Source autocomplete data from an external API
• Assume the source will supply additional properties that can be used in a result handler callback function
• Dropdown positioning works correctly in Bootstrap navbars and complex layouts
• Optional maxWidth configuration to control dropdown width using Bootstrap column classes (e.g., col-4, col-6)
• Uses Bootstrap 5 classes exclusively – no custom CSS required
• Selector for automatically selecting when the results are down to a single row
• Automatically repositions dropdown on scroll and resize events

[Demo] [Download]

4. Advanced Feature-rich Autocomplete JavaScript Library – awesomplete

A simple yet highly customizable, user-friendly, feature-rich autocomplete library written in pure JavaScript.

Features:

• Supports both dynamic (AJAX) and static data list.
• Animated suggestion popup when triggered.
• Supports fuzzy search.
• Highlights characters in the popup.
• Allows to trigger the autocomplete with a specific character.
• Allows to replace values.
• Allows to sort list itmes.
• Allows multiple values just like a tag input.
• Automatically select the first item or not.

[Demo] [Download]

5. Accessible Autocomplete Component In Vanilla JavaScript – Autocomplete

A fast, dynamic, accessible (WAI-ARIA) compliant autocomplete component written in vanilla JavaScript.

Features:

• Accessible, with full support for ARIA attributes and keyboard interactions. Based on the WAI-ARIA Authoring Practices.
• Available as a JavaScript or Vue component.
• Core package available if you want to bring your own rendering layer.
• Customizable. Easily bring your own CSS, or take full control of the component rendering.
• Support for asynchronous data fetching.

[Demo] [Download]

6. Fast Autocomplete & Typeahead Library – autoComplete.js

A dynamic, blazing-fast,  dependency-free,  and easy-to-use autocomplete & typeahead JavaScript library for modern web development.

Features:

• Auto displays the suggestion list while typing.
• Fuzzy search is supported.
• Highlights matched results.
• Custom placeholder.
• Limits the maximum number of results to display.

[Demo] [Download]

7. Tiny And Fast Autocomplete JavaScript Library – Autocomp.js

A super-tiny and blazing-fast autocomplete JavaScript library for the web. It can fetch suggestions asynchronously from a local or remote data source and render them inline as the user types. Works with the native input field.

[Demo] [Download]

8. Fast Autocomplete Dropdown For Input Field – autocomplete.js

A vanilla JavaScript autocomplete library that attaches a blazing fast autocomplete dropdown list to your input field while typing.

[Demo] [Download]

9. Floating Autocomplete Box For Textarea – floatype.js

A lightweight and fast JavaScript library that adds autocomplete/autosuggestion functionality to textareas. As soon as you start typing characters into a textarea, the library automatically displays a floating dropdown box next to the cursor with preset suggestions to choose from.

[Demo] [Download]

10. Lightweight JavaScript Autocomplete for Input Fields – Suggestify.js

A lightweight JavaScript autocomplete plugin that adds type-ahead suggestions to input fields.

It matches user input against a predefined array of strings and displays potential completions in a clean, navigable dropdown list.

Features:

• Multi-word suggestion support: Handle complex entries containing whitespace characters.
• Array input functionality: Accept multiple comma-separated values in a single input field.
• Keyboard navigation: Navigate suggestions using arrow keys and select with Enter.
• Duplicate prevention: Block duplicate entries automatically when enabled.
• Case-sensitive matching: Toggle between case-sensitive and case-insensitive filtering.
• Custom callbacks: Execute functions after selection or form submission.

[Demo] [Download]

More Resources:

To find more JavaScript libraries to enhance your select boxes on the web app, don’t forget to check out our other awesome resources.

• 10 Best Autocomplete & Typeahead JavaScript Plugins
• 10 Best Multiple Select Plugins
• 10 Best Multiple Select Libraries For Angular
• 10 Best Dropdown Plugins To Replace The Native Select Box