String Repeater
Repeat any text string a specified number of times with a custom separator. Generate repeated patterns, test data, and filler text instantly.
Frequently Asked Questions
- × 80), and padding SQL INSERT statements.- repeated 80 times for terminal borders); generating test data (100 copies of a JSON object or CSV row template); padding strings to a fixed width; building ASCII art borders and banners; creating bulk SQL values (?, repeated N times for parameterized queries); and filling placeholder content in design mockups.
abc, abc, abc. With newline separator: each repetition appears on its own line. With no separator: repetitions are concatenated directly: abcabcabc. Choose "Custom" to use any string — including tab (\t), pipe (|), or multi-character delimiters.
"abc" * 3; JavaScript uses "abc".repeat(3); PHP uses str_repeat("abc", 3); Ruby uses "abc" * 3. Under the hood, these all concatenate copies — which is why very large repeat counts can be slow or memory-intensive. This tool is useful for generating the repeated string without writing any code.
"x" * 10000) which has no practical repetition limit other than available memory.
= × 60 for a section divider; * × 40 for a banner separator; -+- × 20 for a decorative border; # × 80 for a comment block header. Use No separator to join repetitions without gaps. Combine the output with the Find & Replace tool to build more complex multi-line ASCII patterns.
Array.fill().join() approach used here is efficient for up to 1,000 repetitions of typical strings. The limiting factor is output size in the DOM — displaying many megabytes of text in a textarea can cause the browser to slow down. If you are generating repetitions for use in code (not for display), consider using your language's native string multiply operator directly, which avoids the browser rendering overhead entirely.
About This String Repeater
This free string repeater duplicates any text a specified number of times, with a configurable separator between repetitions. Enter a string, set a repeat count and delimiter, and copy the result instantly.
When to use this tool
- Generating test input with repeated patterns
- Creating separator lines or dividers of a specific character length
- Building repeated SQL VALUES or placeholder clauses
- Filling a text field with a repeated pattern for load testing
Standards & References
How It Works
Enter Your String
Type or paste the text you want to repeat. Multi-line input is supported — the entire block is repeated as a unit.
Set Repeat Count & Separator
Choose how many times to repeat (1–1000) and what separator to use between repetitions: none, newline, comma, space, or a custom string.
Copy the Output
The repeated string appears instantly with character and repetition counts. Copy to clipboard with one click.
Common Use Cases
Test Data Generation
Quickly generate lists of identical test records or dummy values for seeding databases, running performance benchmarks, or populating form fields.
Stress Testing Input Fields
Repeat a long string to create maximum-length input for testing form validation, database column sizes, and UI truncation behaviors.
Lyrics & Poetry Refrains
Repeat a chorus or refrain multiple times to build out song lyrics or poetry without copy-pasting. Newline separator keeps each verse on its own line.
UI Fill Patterns
Repeat a pattern character or phrase to fill progress bars, ASCII art borders, or placeholder banner text in terminal UIs or mockups.
Comma-separated Value Lists
Use comma separator to repeat a value into a CSV-ready list — e.g., a default category or flag value for a batch SQL INSERT statement.
Placeholder Content
Repeat a single sentence or phrase as filler text for layout templates when Lorem Ipsum is too formal or doesn't fit the design context.
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What Actually Happens When You Repeat a String 1,000,000 Times — and Which Operations Become Catastrophically Slow
Repeating "abc" 1,000 times is a one-character operation in Python — but what you do with the result matters enormously. String concatenation in a loop with a large repeated string is O(n²); using join() is O(n); at scale, the difference is seconds vs hours. Here's what repetition actually creates in memory, which operations scale linearly vs quadratically on large strings, how JavaScript's "string ropes" differ from Python's contiguous buffers, and when virtual repetition (storing pattern + count) is better than materializing the full string.
String Repetition and ANSI Escape Codes: How Progress Bars, Borders, and Terminal UIs Are Built
A terminal progress bar, a box-drawn menu, and colored CLI output all rely on the same underlying operation: repeating a character a calculated number of times, often combined with ANSI escape codes for color and cursor control. Here's how string repetition builds progress bars and borders, why Unicode box-drawing characters connect seamlessly at corners, and how terminal width affects repeated-character output.
String Padding and Repetition Across Languages: Python, JavaScript, SQL, and Bash
Python's str * n, JavaScript's repeat() and padStart(), SQL's RPAD() and LPAD(), and bash printf are all solving the same problem: building strings of specific lengths and patterns. Here's the complete cross-language reference for string repetition and padding with practical formatting examples.
Stress Testing with Repetitive Data: The Edge Cases That Break Real Systems
Normal test data misses the edge cases that break real systems. Here's how repetitive and generated data exposes UI text overflow bugs, database cardinality issues, ReDoS vulnerabilities, and the principles behind fuzz testing and property-based testing.
String Repeater — Repeat Any Text Any Number of Times Instantly
Learn how to use a string repeater to generate repeated text for test data, divider lines, SQL placeholders, UI stress testing, and pattern generation — with separator options and real examples.
