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React Complex Tree VS Fillr.app

Compare React Complex Tree VS Fillr.app and see what are their differences

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React Complex Tree logo React Complex Tree

Unopinionated accessible tree component with drag and drop

Fillr.app logo Fillr.app

Form Filler & Test Data Manager: AutoFill With Data You Control
  • React Complex Tree Landing page
    Landing page //
    2023-10-14
  • Fillr.app Capture Once, Fill Forever
    Capture Once, Fill Forever //
    2026-06-26
  • Fillr.app You Decide Every Field
    You Decide Every Field //
    2026-06-26
  • Fillr.app Fill From Your Own Data
    Fill From Your Own Data //
    2026-06-26
  • Fillr.app Speaks +60 Languages
    Speaks +60 Languages //
    2026-06-26
  • Fillr.app Fill Forms With One Click
    Fill Forms With One Click //
    2026-06-26

Fillr is a form filler and test data manager for Chrome โ€” for when it matters what goes into every field. Save any form as a preset with a rule per field, fill it from your own CSV or Excel rows, and manage all your test data in one place. Realistic generated data (110+ types, 60+ languages) is built in โ€” but you decide where it goes.

Anyone can spray random values into a page. Fillr is for when the data has to be right.

๏ฟฝ EVERY FIELD, YOUR RULES โœ“ Capture any form once and save it as a reusable preset โœ“ Set a rule per field: Generate, Fixed value, Blank, Skip, or Dataset column โœ“ Presets auto-match pages by URL pattern โ€” the right preset surfaces the moment you land on the page (with a picker when several match) โœ“ Preview the fill before you run it โœ“ Unlimited presets, free

๏ฟฝ FILL FORMS FROM YOUR OWN DATA (Pro) โœ“ Link a dataset to a preset, map columns to fields, and fill row by row โ€” sequential with a "row 3 of 20" readout, or random โœ“ Run 50 test cases through the same checkout without typing a single value โœ“ Your edge cases, your real records, your regression rows โ€” not random noise

๏ฟฝ๏ธ A REAL TEST DATA MANAGER โœ“ Import CSV, Excel or JSON โ€” or generate sheets of realistic dummy data โœ“ Edit rows in a spreadsheet grid, organize with tags โœ“ Export any dataset to CSV, Excel or JSON

โšก INSTANT FILL, WHEN YOU JUST NEED VALUES One click auto-fills every field with realistic fake data โ€” names, emails, addresses, phones, dates and more. Zero setup, works on any site, one-click Clear when you're done.

๏ฟฝ 60+ LANGUAGES (Pro โ€” English is free) Generate locale-accurate names, addresses and phone numbers in French, German, Japanese, Arabic and dozens more for international testing.

๏ฟฝ๏ธ POINT-AND-CLICK, 100% NO-CODE A side panel plus a draggable floating bar on the page. Fill, clear, capture, switch presets โ€” no scripts, no selectors, no JSON to edit.

React Complex Tree

Pricing URL
-
$ Details
Platforms
-
Release Date
-

Fillr.app

Website
fillr.app
$ Details
freemium $9.99 / Monthly
Platforms
Web (Dashboard) Chrome
Release Date
2026 June

React Complex Tree features and specs

  • Customizability
    React Complex Tree offers a high degree of customizability, allowing developers to tailor the tree component to fit their specific needs. This can be especially useful for creating unique UI experiences.
  • Feature-Rich
    The library includes a wide range of features out of the box such as drag-and-drop support, keyboard navigation, and dynamic data loading, which can save development time.
  • Accessibility Support
    React Complex Tree is designed with accessibility in mind, providing support for ARIA attributes and keyboard interactions, which helps ensure that applications are usable by people with disabilities.
  • Performance
    The component is optimized for performance, handling large data sets efficiently without significant slowdowns, which is critical for applications that manage extensive hierarchical structures.
  • Community and Documentation
    The library has a supportive community and well-structured documentation, providing developers with ample resources to troubleshoot and extend its functionality.

Possible disadvantages of React Complex Tree

  • Complexity
    Due to its extensive features and customizability, React Complex Tree can be complex to set up and configure properly, which may lead to a steeper learning curve for new users.
  • Bundle Size
    As a feature-rich component, React Complex Tree can increase your bundle size, which might be a concern for projects where performance and loading time are critical.
  • Third-Party Dependency
    Relying on a third-party library introduces dependencies outside of your control, which may present challenges in terms of long-term maintenance and potential update or deprecation issues.
  • Specific Use Case Tailoring
    While it offers a lot of features, developers may find that very specific use cases require additional effort to customize or extend the component beyond its intended use.

Fillr.app features and specs

  • Presets
    Capture any web form as a reusable preset โ€” refill in one click
  • Filling Rules
    Per-field fill rules: generated data, fixed value, your own data, or skip
  • Datasets
    Datasets module: build, generate, or import rows of test data
  • Your Data
    Fill forms with your own imported data, not just fake values
  • Bulk Data Generation
    Use presets schema to generate bulk of data
  • 60+ locales
    60+ locales for realistic, region-specific test data

Analysis of React Complex Tree

Overall verdict

  • React Complex Tree is a solid, headless React library for building tree-view UI components, offering strong accessibility support, drag-and-drop, multi-selection, and search out of the box, while giving developers full control over styling and rendering. It's a good choice for developers who need a robust, unstyled tree component without reinventing complex interaction logic.

Why this product is good

  • Headless design gives full control over styling and markup, making it easy to integrate with any design system or CSS framework
  • Built-in accessibility (ARIA-compliant, keyboard navigation) saves significant development time
  • Supports advanced features like drag-and-drop reordering, multi-selection, and renaming out of the box
  • Actively maintained with good documentation and TypeScript support
  • Flexible data model that supports both controlled and uncontrolled tree state management
  • Free and open-source with no licensing costs

Recommended for

  • Developers building file explorers, folder structures, or nested navigation menus
  • Teams that need a customizable tree component that matches their existing design system
  • Projects requiring accessible, keyboard-navigable tree interfaces
  • Applications needing drag-and-drop reordering of hierarchical data
  • TypeScript-based React projects seeking type-safe tree components
  • Developers who prefer headless UI libraries over pre-styled component kits

Analysis of Fillr.app

Overall verdict

  • Fillr.app appears to be a form-filling automation tool designed to save time by auto-completing online forms, applications, and repetitive data entry tasks. Based on available information, it offers a convenient solution for reducing manual typing, though users should verify current features, pricing, and security practices directly on their site before committing.

Why this product is good

  • Automates repetitive form-filling tasks to save time
  • Reduces manual data entry errors
  • Likely offers browser extension or integration for ease of use
  • Can store commonly used information for quick access across multiple sites

Recommended for

  • Job seekers filling out multiple online applications
  • Professionals who frequently complete online forms
  • Small business owners handling repetitive data entry
  • Users looking to streamline online registration and checkout processes

Category Popularity

0-100% (relative to React Complex Tree and Fillr.app)
Developer Tools
100 100%
0% 0
Web Forms
0 0%
100% 100
Design Tools
100 100%
0% 0
Chrome Extensions
0 0%
100% 100

Questions & Answers

As answered by people managing React Complex Tree and Fillr.app.

What makes your product unique?

Fillr.app's answer:

It leads with control, not random fill. Capture any web form as a reusable preset, set per-field rules (generated, fixed, your own data, or skip), and refill in one click โ€” plus a built-in Datasets module to build, generate, and export test data. A form-filler and test-data manager in one, no code.

Why should a person choose your product over its competitors?

Fillr.app's answer:

Fake Filler only sprays random data; Mockaroo generates data but can't fill forms. Fillr does both โ€” and lets you fill with your own data, with reusable presets, per-field control, and 60+ locales. No scripts.

How would you describe the primary audience of your product?

Fillr.app's answer:

QA engineers and developers who repeatedly test web forms and need realistic, controllable test data. Demo and sales engineers are a natural secondary audience.

Which are the primary technologies used for building your product?

Fillr.app's answer:

Next.js 15, React 19, and TypeScript dashboard; a Manifest V3 Chrome extension built with Vite and supabase for backend

User comments

Share your experience with using React Complex Tree and Fillr.app. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, React Complex Tree seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

React Complex Tree mentions (2)

  • I'm building react-complex-tree, an unopinionated tree component for react, and recently released a new version!
    You can find the source code for it at https://github.com/lukasbach/react-complex-tree, and documentation and examples at https://rct.lukasbach.com. Source: over 3 years ago
  • I made an Unopinionated Accessible Tree Component with Multi-Select and Drag-And-Drop
    More examples on the customizability, in-depth documentation and a typing API is available at the documentation homepage: https://rct.lukasbach.com/. Source: about 5 years ago

Fillr.app mentions (0)

We have not tracked any mentions of Fillr.app yet. Tracking of Fillr.app recommendations started around Jun 2026.

What are some alternatives?

When comparing React Complex Tree and Fillr.app, you can also consider the following products

Pagedraw - Beta release - Compile UI Mockups to React Code

QuickForm - Autofill Forms - Chrome extension to autofill forms easier and faster.