A tabs to spaces converter instantly replaces tab characters with spaces (or spaces with tabs) using your preferred tab width. Whether you are normalizing code formatting, fixing indentation inconsistencies, or working on a team with mixed editor settings, this free online tab converter gives you instant, accurate results. No signup required.
Try the Free Online Tabs to Spaces Converter
How It Works
Step 1: Paste your text
Enter or paste text that contains tabs (or spaces you want to convert). The tool handles any amount of text, from single lines to entire files.
Step 2: Configure settings
Choose your desired tab width (2, 4, or 8 spaces) and select the conversion direction — tabs to spaces or spaces to tabs.
Step 3: Convert and copy
Click the Convert button to see the result. The output preserves all line breaks and content while only changing the whitespace characters.
Real-World Examples
Code Normalization: Your team uses mixed editors — some with tabs, some with spaces. Convert all tabs to 4 spaces to enforce consistent indentation across the codebase.
Config File Cleanup: A YAML file was edited in multiple editors and now has mixed tabs/spaces causing parse errors. Convert everything to spaces to fix the formatting.
Code Review: A pull request uses 2-space tabs but your project standard is 4 spaces. Convert before reviewing to see the code as it will appear in your editor.
Prettier & Formatter Consistency (Frontend Developer): Your CI pipeline runs a linter that enforces 2-space indentation, but a colleague's editor inserted tabs. You convert the file to 2 spaces, and the linter passes on the next push without a single formatting error.
Legacy Export (Data Analyst): A mainframe export uses tabs as column delimiters, but your spreadsheet import expects spaces. Convert tabs to 4 spaces and the data imports cleanly into columns, avoiding the manual find-and-replace you used to run each week.
Features
- Tab width options: 2, 4, or 8 spaces
- Bidirectional: tabs to spaces OR spaces to tabs
- Preserves all line breaks and content exactly
- 100% private — all processing happens in your browser
- Works with any text size, from snippets to entire files
- Free forever with instant results
Use Cases
Developers
Normalize indentation across codebases, fix mixed tabs/spaces, and enforce consistent formatting before code review.
Writers & Editors
Clean up documents with inconsistent spacing from copy-pasting between different editors or word processors.
DevOps & Sysadmins
Fix configuration files (YAML, JSON, INI) that have mixed whitespace causing parsing errors on Linux servers.
Tips & Best Practices
- Match your project's style guide: Check your repository's .editorconfig, .prettierrc, or team convention before choosing a tab width. Most modern codebases standardize on 4 spaces, while Go and some tools prefer tabs. Use the width your team already uses to avoid introducing format changes that bloat pull requests.
- Normalize one codebase at a time: When cleaning up mixed indentation, convert entire files or directories consistently. Converting a single file while leaving others untouched creates invisible inconsistency that confuses future reviews.
- Fix YAML before parsing: YAML rejects mixed tabs and spaces with a strict parsing error. If a config file fails to load, run it through this tool with a consistent 2 or 4-space width to restore valid formatting immediately.
- Use the reverse direction for legacy imports: Some tools and mainframe-style formats require tabs rather than spaces. Select Spaces to Tabs when you need to shrink file size or conform to a tab-based standard.
- Pair with Trim Whitespace: Run Trim Whitespace first to remove trailing spaces and clean the edges, then convert the inner indentation with this tool for a fully tidy file.
Frequently Asked Questions
Q: How does the tabs to spaces converter work?
A: The tool replaces every tab character with the number of spaces you specify. For example, with tab width 4, each tab becomes 4 spaces.
Q: What tab width should I use?
A: Common tab widths are 2, 4, or 8 spaces. 4 is the most widely used in modern codebases. Check your project's .editorconfig or style guide.
Q: Can I convert spaces back to tabs?
A: Yes. Select the Reverse direction and the tool converts consecutive spaces back to tab characters based on the configured width.
Q: Is my text data kept private?
A: Yes. All processing happens in your browser. No text is sent to any server.
Q: Does it preserve line breaks?
A: Yes. The tool only affects tab characters. Line breaks, carriage returns, and other whitespace are preserved exactly as in the original.