diff --git a/Data/ByteSet.hs b/Data/ByteSet.hs
--- a/Data/ByteSet.hs
+++ b/Data/ByteSet.hs
@@ -15,6 +15,7 @@
     -- * Construction
   , empty
   , singleton
+  , generate
   , insert
   , delete
     -- * Combine
@@ -39,6 +40,7 @@
   , (+), (-), ($), (*)
   , fromIntegral
   , Show (..)
+  , seq
     )
 import Data.Word (Word8, Word64)
 import Data.Int (Int)
@@ -83,7 +85,7 @@
   where
     i = fromIntegral w
 
-generalOp :: (Word64  -> Word64  -> Word64 )
+generalOp :: (Word64  -> Word64  -> Word64)
           ->  ByteSet -> ByteSet -> ByteSet
 {-# INLINE generalOp #-}
 generalOp f (ByteSet s1 s2 s3 s4)
@@ -130,7 +132,33 @@
 singleton :: Word8 -> ByteSet
 singleton w = insert w empty
 
--- | /O(1)/. Delete a byte in the byteset. Returns the original byteset when the byte was not present.
+generatePart
+  :: Int -- ^ Offset
+  -> (Word8 -> Bool) -- ^ Element test
+  -> Word64
+generatePart offset test = go 0 0
+  where
+    go :: Word64 -- Accumulator
+       -> Int -- Index
+       -> Word64
+    go acc 64 = acc
+    go acc i =
+      let i' = i + offset
+          acc' = if test $ fromIntegral i' then setBit acc i else acc
+      in  acc' `seq` go acc' (i+1)
+
+-- | /O(n)/. Generate a byte set from a test function.
+--   The result will contain all bytes that pass the test.
+generate :: (Word8 -> Bool) -> ByteSet
+generate f =
+  ByteSet
+    (generatePart   0 f)
+    (generatePart  64 f)
+    (generatePart 128 f)
+    (generatePart 192 f)
+
+-- | /O(1)/. Delete a byte in the byteset.
+--   Returns the original byteset when the byte was not present.
 delete :: Word8 -> ByteSet -> ByteSet
 delete = generalSet clearBit
 
diff --git a/LICENSE b/LICENSE
deleted file mode 100644
--- a/LICENSE
+++ /dev/null
@@ -1,30 +0,0 @@
-Copyright (c) 2023, Daniel Casanueva
-
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-
-    * Redistributions in binary form must reproduce the above
-      copyright notice, this list of conditions and the following
-      disclaimer in the documentation and/or other materials provided
-      with the distribution.
-
-    * Neither the name of Daniel Casanueva nor the names of other
-      contributors may be used to endorse or promote products derived
-      from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/byteset.cabal b/byteset.cabal
--- a/byteset.cabal
+++ b/byteset.cabal
@@ -1,14 +1,14 @@
+cabal-version:       1.18
 name:                byteset
-version:             0.1.1.2
+version:             0.1.2.0
 category:            Data
 synopsis:            Set of bytes.
 description:         Data structure for sets of bytes, where bytes are @Word8@ values.
-license:             BSD3
-license-file:        LICENSE
+license:             MIT
+license-file:        license.txt
 maintainer:          Daniel Casanueva (coding `at` danielcasanueva.eu)
 bug-reports:         https://codeberg.org/daniel-casanueva/byteset/issues
 build-type:          Simple
-cabal-version:       1.18
 extra-doc-files:     changelog.md
 
 library
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,6 @@
+## 0.1.2.0
+* Add `generate` function.
+
 ## 0.1.1.2
 * Metadata update.
 
diff --git a/license.txt b/license.txt
new file mode 100644
--- /dev/null
+++ b/license.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Daniel Díaz Casanueva
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.