Best Interior Design Apps Free in 2026: 8 Apps Compared

Planner 5D is the easiest free entry point for most homeowners. You draw walls, add doors and windows, drop in furniture, and switch between a 2D plan and a 3D view. The editor runs in a browser and on mobile, so you can start a layout on a laptop and tweak it on a phone. The free tier allows many projects, but only part of the catalogue is free, and free renders carry limits. That is fine for testing layouts and sharing screenshots, but not ideal for polished client images. For a first room plan, Planner 5D is still the most approachable free tool on this list.

Homestyler suits people who care more about how a room looks than about exact measurements. You can design a room from scratch, upload a photo to restyle it, and render views to compare colours, furniture, and layouts. The drag-and-drop editor is forgiving for beginners, and the basic tier allows 1K renders. Higher-resolution renders and some advanced tools sit behind paid plans, so check export quality before you plan a presentation. For styling ideas, mood boards, and a quick visual check before buying furniture, Homestyler gives a strong free starting point.

Sweet Home 3D is the honest free option in this list. The core desktop app is open source, with no subscription needed to draw plans, add furniture, and view the result in 3D. You can work offline, save projects locally, and export images without a free-tier watermark on the desktop version. The interface looks older than browser rivals, and the built-in furniture is generic rather than brand-led. If you want a free tool with no project cap and no upsell for core planning, Sweet Home 3D is the clearest choice. It suits patient users who value control and offline work over polish.

SketchUp Free is a browser-based 3D modeller for people who want to build custom shapes rather than place catalogue furniture. You can model a room, a built-in unit, or an unusual layout with precise tools, and pull models from the 3D Warehouse to fill the space. That freedom suits confident users and design students. The free edition is for personal use, not commercial client work, and the learning curve is steeper than Planner 5D or Homestyler. Export options are also more limited than the paid editions. If you want to model something standard tools cannot, SketchUp Free is worth the extra learning time.

Floorplanner is a strong choice when measurements matter. You draw walls to size, add multiple floors, and place furniture from a large catalogue, then view the result in 2D or 3D in a browser with no download. That makes it useful for planning a move, a renovation, or a furniture purchase with real dimensions. The free tier limits the number of projects and designs, and free exports are low resolution with a watermark. Higher-resolution exports and tours need credits or a paid plan. For a few careful plans, the free tier is enough. For many versions of the same room, the limits will show quickly.

Roomstyler is built for quick decorating rather than detailed construction plans. You start with a room shape, add branded furniture and decor, and view the result in 3D or as a virtual tour. The browser editor needs no install, which makes it easy to test several styles for one room in an evening. Measured accuracy is weaker than Floorplanner or RoomSketcher, so use Roomstyler for styling and mood, not for final dimensions. The branded catalogue is useful when you want to see real products in a room, though availability varies by region. For fast visual ideas, it is a pleasant free tool.

HomeByMe lets you build a home in 2D, furnish it, and walk through the result in 3D. The tour view helps you judge whether a layout feels right, rather than just looking right on a flat plan. That sense of space matters when you are deciding on room sizes, door positions, and furniture scale. The free tier limits projects and full-quality images, so plan your main designs before you spend the free allowance. Paid plans raise those limits and improve image quality. HomeByMe suits homeowners who want a realistic preview of a renovation or a move, with a tour they can share with family or a builder.

RoomSketcher focuses on clean, measured floor plans with furniture and 3D snapshots. The drawing tools suit users who want a tidy plan for a listing, a renovation brief, or a furniture layout, without learning a full 3D modeller. You can draw rooms, add levels, and produce a presentable plan from the same project. The free tier allows drawing and snapshots, but finished plan exports and some upgrades are paid. That means RoomSketcher is best for planning and previewing, with a paid step if you need polished exports. For one or two measured plans, the free tier is a practical starting point.