JSON editor

Preview

Choose a ready-made template for a single cleaning or open “Batch-replacement” to assemble a chain of templates like blocks.

Template

In the "Find" field, you can use JavaScript RegExp or switch RegExp off and search for plain text only. Flags: g — all matches, i — case-insensitive, m — multi-line mode. An empty replacement deletes the match.

Template

Name

FindMatch case

Replace with

Done.

About Editor

Free and Secure Online JSON Editor with Preview

Replitor is a practical online JSON editor for reviewing, cleaning, and editing structured text directly in your browser. It helps you work with JSON snippets, replacement chains, exported settings, and mixed HTML or text content while keeping the editing process simple and fast.

The editor combines source editing, live preview, Batch Replace, RegExp search, reusable JSON-based chains, quick replace buttons, optional change history, and local snapshot recovery. It is built for everyday cleanup tasks where you need control, visibility, and a safer way to edit without sending your content away.

JSON Editor Online Free and Secure Live Preview RegExp Replace Local Processing

What’s already built in

Edit JSON, HTML, and plain text in a browser-based source view with line numbers, wrap control, and quick text sizing.
Use the preview panel to check how edited content, markup, or generated output looks while you work.
Create reusable JSON chains for multi-step cleanup, structured replacements, and repeatable editing workflows.
Run Find & Replace with plain text or RegExp patterns for faster cleanup of large copied or exported content.
Save custom templates and quick replace buttons for common JSON, HTML, or text editing actions.
Keep temporary work safer with local snapshots and optional session-based history for the current browser tab.

Why it’s easy to use

A good JSON editor online should make structured editing clear without turning simple work into a heavy developer tool. Replitor lets you paste content, inspect it in the source area, run precise replacements, build a reusable JSON workflow, and verify the result in the preview side by side.

This is useful for JSON chains, CMS exports, AI-generated content, configuration snippets, email markup, old admin panels, and messy copy-paste jobs. You can clean the data once, save the pattern, and reuse the same workflow again when similar content appears.

Free, Secure, and Local

Replitor is designed as a free and secure online JSON editor with preview that works on the user’s device. Your JSON, HTML, custom templates, quick replace buttons, and current snapshot are processed locally and are not sent to the server for editing.

Persistent user data stays in localStorage, while temporary history and current-tab recovery data stay in sessionStorage. This keeps everyday editing convenient while giving you more control over private drafts, structured text, and reusable replacement workflows.

The project is developed step by step, with current work focused on better performance for large documents, safer preview editing, cleaner JSON-based workflows, and more practical editor modes built around the same simple interface.

Most of the icons in the editor interface are taken from Phosphor Icons.