Run-Length Encoder
Compression · Free Online Tool
RLE run-length encoding for data with repeated chars.
Click "Encode" to run...Count+Byte Pairs
Each run becomes a 1-byte count + 1-byte value. Runs longer than 255 split.
Great for Bitmaps
Excellent on images with flat regions, masks, and sparse binary data.
Base64 Transport
Output is base64-encoded so it survives copy/paste and text fields.
How to Use Run-Length Encoder
- 1Enter or paste the text you want to compress.
- 2Select the compression algorithm (gzip, deflate, or brotli).
- 3Click compress to reduce the data size.
- 4Copy or download the compressed output.
Features
- ✓100% free — no signup, no subscription, no ads
- ✓Runs entirely in your browser — data never leaves your device
- ✓Fast and lightweight — instant results
- ✓Cross-platform — works on desktop, tablet, and mobile
Frequently Asked Questions
What compression algorithms are supported?
We support gzip, deflate, and brotli compression algorithms for text data.
Is there a file size limit?
Since tools run in your browser, the limit depends on your device memory. Most tools handle several megabytes without issues.
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Learn the concept
Learn the concept
Understand the programming ideas behind this tool.