diff --git a/README.md b/README.md
index 8c6cb02..358354c 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,33 @@
-# ffwebp
+# FFWebP
 
-*todo*
+FFWebP is a command line utility for converting images between multiple formats. It automatically detects the input format and encodes the output using
+
+## Features
+
+- Pure Go implementation with no external runtime dependencies
+- Supports BMP, GIF, JPEG, PNG, TIFF and WebP
+- Lossy or lossless output with configurable quality
+- Output codec selected from the output file extension when `--codec` is omitted
+- Full set of format-specific flags for every supported format (see `ffwebp --help`)
+- Additional formats may be added in the future
+
+## Building
+
+Compile with all codecs enabled using the `full` build tag:
+
+```bash
+go build -tags full -o ffwebp ./cmd/ffwebp
+```
+
+You can enable a subset of codecs by selecting the appropriate build tags (for example `-tags "jpeg,png"`).
+
+## Usage
+
+```bash
+ffwebp -i input.jpg -o output.webp
+```
+
+Run `ffwebp --help` to see the full list of flags.
 
 ## License