Autoprefixer
Add vendor prefixes to CSS. Includes vendor prefix addition and browser compatibility. Runs in your browser — free, no signup, no install, no data upload.
Developer ToolsAbout this tool
Autoprefixer is a free online developer utility you can use in your browser for coding, APIs, and data tasks.
Add vendor prefixes to CSS.
For typical use, processing happens in your browser—nothing is sent to our servers unless the tool clearly performs a network request (for example a lookup or fetch). Avoid pasting highly sensitive secrets if you are unsure how a specific tool handles data.
Features
- vendor prefix addition
- browser compatibility
- Complexity: simple
- Category: Developer Tools
How to use
- Open the toolLoad Autoprefixer in your browser. No installation is required.
- Enter your inputType or paste your text, or use the inputs shown. Adjust any options that match your task.
- Use the resultCopy, download, or apply the output using the buttons or preview the tool provides.
Guides
- Autoprefixer: privacy tips and best practices Use Autoprefixer safely: what stays in the browser, what to avoid pasting, and habits that reduce mistakes.
- Why a browser-based Autoprefixer helps Skip installs for quick tasks: how Autoprefixer fits next to desktop apps and CLIs (Add vendor prefixes to CSS).
- Autoprefixer: troubleshooting and FAQ-style fixes Common issues with Autoprefixer: empty output, slow tabs, wrong encoding. Practical checks before you give up (Add vendor prefixes to CSS).
- Practical use cases for Autoprefixer Where Autoprefixer fits in real tasks: Add vendor prefixes to CSS. Ideas for daily workflows and hand-offs.
- Autoprefixer: quick start in your browser Open Autoprefixer, run your task locally in the tab, and get results fast. No install: Add vendor prefixes to CSS.
Popular tools
Token Generator
Generate random tokens/strings for auth. Includes custom length, character set selection, and multiple token formats. Free browser tool — no signup, no install.
Developer ToolsJSON Formatter
Format and beautify JSON data. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsJWT Decoder
Decode and inspect JWT tokens. Includes header inspection and payload decoding. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsJSON Viewer
View JSON data in a tree structure. Includes tree view, collapsible nodes, and search. Runs in your browser — free, no signup, no install, no data upload.
Developer ToolsCSS Formatter
Format and beautify CSS code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsHTML Formatter
Format and beautify HTML code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsRelated tools
Token Generator
Generate random tokens/strings for auth. Includes custom length, character set selection, and multiple token formats. Free browser tool — no signup, no install.
Developer ToolsJWT Decoder
Decode and inspect JWT tokens. Includes header inspection and payload decoding. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsEncrypt & Decrypt Text
Encrypt or decrypt text with various algorithms. Includes multiple algorithms and key input. Runs in your browser — free, no signup, no install, no data upload.
Developer ToolsHTML Viewer
Preview HTML code in real-time. Includes live preview, syntax highlighting, and code input. Runs in your browser — free, no signup, no install, no data upload.
Developer ToolsHTML Formatter
Format and beautify HTML code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsLua Beautifier
Format and beautify Lua code. Includes indentation options and syntax highlighting. Runs locally in your browser — free, no signup, no install, no data upload.
Developer ToolsFrequently Asked Questions
What does the Autoprefixer tool do?
Add vendor prefixes to CSS. It is listed under Developer Tools on FreeEasyToolsOnline.
Is my data sent to your servers?
Most processing for this tool runs in your browser. Do not paste secrets you cannot afford to expose, and read any on-page warnings for tools that intentionally call external APIs.
Do I need to install anything?
No. Use a modern desktop or mobile browser. For best results, keep the page open until processing finishes for large files or long operations.
Can I use this tool on a phone or tablet?
Yes, most tools work on mobile browsers. Complex editors or large file workflows may be more comfortable on a desktop.
Can I rely on this for legal, medical, or financial decisions?
These utilities are for general productivity. For regulated or high-stakes decisions, verify results with qualified professionals and your own systems of record.