json-xls.com is described as 'Application allows to view and edit simple and complex JSON documents in spreadsheet view (like Microsoft Excel), preview images stored in Base64 JSON string, navigate through document hierarchy, etc'. There are more than 10 alternatives to json-xls.com for Online / Web-based, Windows, Android, Self-Hosted solutions and SaaS. The best alternative is VisualJsonEditor, which is both free and Open Source. Other great apps like json-xls.com are JSONMate (Free, Open Source), Json Editor (Free), JSON Editor Online (Free) and JSONedit (Free).
Visual JSON Editor is a JSON schema draft v4 based file editor for Windows: When opening a JSON file, the application auto-generates an editor GUI based on the provided JSON schema. The goal is to make JSON editing more effective and easier for users.
JSON Online Viewer is a fast JSON tree visualizer. Intended for small-to-medium sized JSON texts. Main features are: visually pleasing, easy interactivity and reliability. The tree can be searched with the browser's native search function (Ctrl-F).