Remove empty lines, duplicates, comments and trim whitespace from text files.
The filtered text will appear here...
When working with large text files, logs, or data exports, you often need to extract only the lines that match — or don't match — a specific pattern. Our text filter lets you include or exclude lines based on keywords, regex patterns, or conditions, turning a 10,000-line log into just the 15 entries you care about in seconds.
Extracting error lines from server logs or application outputs. Filtering CSV rows that contain a specific value or keyword. Removing blank lines, comments, or headers from configuration files. Finding all URLs, email addresses, or IP addresses in a text dump. Cleaning up data exports before importing into another tool. Isolating specific entries from DNS records, hosts files, or access logs.
Filter by simple keyword match or full regular expression patterns. Include mode (keep matching lines) or exclude mode (remove matching lines). Case-sensitive or case-insensitive matching. Real-time preview as you type your filter pattern. Handles files with tens of thousands of lines without lag. Works entirely in your browser — your data stays private and never leaves your device.
Paste your text directly or upload a text file from your device.
Toggle the filters you want: empty lines, duplicates, whitespace trim, prefix, min length.
Copy the filtered text to clipboard or download it as a .txt file.
This tool helps you clean up text files by removing unwanted lines and trimming whitespace.
Perfect for cleaning log files, data exports, code comments, and more.
Multiple filters at onceYour text data is processed entirely in your browser. Nothing is sent to any server.
Clean up sensitive data files with complete privacy.
100% browser-side processingEverything you need to know about our text filter tool