Free Online Editor for Text, Code, and Data
Online Editor is a browser-based editing workspace that handles plain text, JavaScript, markdown, JSON, and XML in a single interface. Open the tool, pick your editing mode from the sidebar, and start typing or upload a file from your computer. Syntax highlighting powered by CodeMirror makes code readable with color-coded keywords, strings, and comments in the Dracula theme. The status bar tracks your line count, word count, character count, and file size as you type. Find and replace lets you search across the entire document and swap text in one click. Everything processes locally in your browser, keeping your content private.
Text Editor
Clean writing environment with word count, find and replace, zoom controls, and file upload for plain text editing.
Code Editor
Full syntax highlighting for JavaScript, Python, HTML, CSS, and XML with bracket matching and auto-close.
Markdown Editor
Split-pane workspace with live preview that renders headings, bold, italic, code, and lists in real time.
JSON Editor
Real-time validation with error messages, one-click pretty-print formatting, and document statistics.
XML Editor
XML validation using DOMParser, auto-indentation formatting, and support for SVG and XHTML files.
Diff Viewer
Side-by-side comparison with color-coded added and removed lines for spotting changes between two texts.
Online Editor with Syntax Highlighting and Live Validation
Editing code or structured data in a basic text box leads to mistakes that are hard to spot. This online editor solves that problem by providing syntax-aware editing with the same features found in desktop applications. JavaScript keywords turn pink, strings turn yellow, and comments appear in gray so you can scan your code at a glance. JSON and XML modes go further by validating your content on every keystroke and displaying a clear "Valid" or "Invalid" badge at the top of the editor. Clicking Format auto-indents compressed data into readable, nested structure without any manual effort.
Upload and Edit Any Text File
Click the Upload button in the toolbar, or drag and drop a file anywhere onto the workspace. The text editor accepts .txt, .log, .csv, and .md files. The code editor handles .js, .jsx, .ts, .tsx, .py, .css, and .html. JSON and XML editors recognize their respective file types automatically. After editing, download the result as a file or copy it directly to your clipboard.
Find and Replace Across the Entire Document
The find bar highlights every match and shows the total count next to the search field. Enter a replacement string and click Replace All to swap every occurrence in one step. This feature works across all editing modes, making bulk text changes fast and reliable.
Markdown Preview and Data Comparison Tools
Beyond standard text and code editing, two specialized modes expand what you can do in this workspace. The markdown editor splits the screen into a source pane and a live preview pane, rendering headings, bold, italic, inline code, and lists as you type. Content writers and developers who work with README files or documentation can see the formatted result without switching to a separate preview tool.
Compare Two Texts with the Diff Viewer
The diff viewer places two editor panes side by side for comparing original and modified text. A result panel at the bottom shows added lines in green and removed lines in red, with counts for each. Load files into each pane separately or paste content directly. This mode is useful for reviewing code changes, comparing configuration files, or spotting differences between two versions of any document.
Zoom, Word Wrap, and Status Bar
Every editing mode includes zoom controls that adjust font size from 9px to 24px, a word wrap toggle for controlling line overflow, and a status bar that updates in real time. The status bar displays line count, word count, character count, and file size so you always know the dimensions of your document without running a separate tool.
Free Online Editor for Developers, Writers, and Students
Whether you are a developer editing a configuration file on a shared computer, a student working on a coding assignment from a library, or a writer drafting content without installing software, this editor provides the tools you need directly in the browser. No account creation, no installation, no file size restrictions. Your content stays on your device because all processing happens client-side with JavaScript. Close the tab and everything disappears from memory.
No Signup, No Installation Required
Open the page and start editing immediately. There are no paywalls, no premium tiers, and no feature limitations. Every editing mode, export option, and tool is available from the first visit. The editor loads CodeMirror from a CDN once and caches it in your browser, so subsequent visits load even faster.
Client-Side Processing for Privacy
Your files and content never leave your computer. Syntax highlighting, validation, formatting, and diffing all run locally using JavaScript APIs. This makes the editor safe for editing sensitive code, proprietary data, API keys in configuration files, or any content you prefer to keep private.
Related Editor and Developer Tools
If you work with text and code regularly, these tools complement what you can do here:
- JSON Formatter -- format, validate, minify, and transform JSON data
- XML Formatter -- format and beautify XML documents
- HTML Formatter -- format and beautify HTML documents
- JS Beautifier -- format, beautify, minify, and validate JavaScript
- CSS Formatter -- format and organize CSS stylesheets
- JavaScript Preview -- run JavaScript live with DOM preview and console capture
- Markdown to HTML -- convert markdown documents to clean HTML