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Huffman Encoder

Compression · Free Online Tool

Huffman coding compress/decompress based on frequency.

By EZ4Code TeamLast updated: 2026-10-29

Input Text219 chars

Huffman JSON

0 chars

Click "Encode" to run...

Frequency Tree

Builds an optimal prefix-free code from symbol frequencies.

Bit-Packed Body

Codes are packed bit-by-bit; the tree is stored as a JSON header for round-trip.

Pure JS

No dependencies — runs anywhere, useful for learning how deflate's entropy stage works.

How to Use Huffman 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.

Can I decompress data produced by other software?

Yes. The decompression tools accept standard gzip, deflate, and brotli streams from any compliant source — command-line tools, web servers, or other libraries.

Why does the compressed output look unreadable?

Compressed data is binary, not text. Use Copy as Base64 or download it as a file — pasting raw compressed bytes into a text field will show garbled characters.