diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,28 @@
+# caniuse.rs
+
+A website to know which feature you can or cannot use in Rust.
+
+## Quickstart
+
+Head over [caniuse.rs](https://caniuse.rs/) and search for the Rust feature you are interested in.
+
+## Developpement
+
+The project uses a standard Rust toolchain.
+
+### Pre-requisites
+
+- **Cargo**
+- **wasm-pack**: `cargo install wasm-pack`
+- **Python3**
+- **rollup**: `npm i -g rollup`
+
+### Commands
+
+Once the requirements are filled up you can run the project with `./x.py serve`
+
+### Creates a new feature
+
+You may want to look at issue [#16](https://github.com/jplatte/caniuse.rs/issues/16) for missing features.
+
+When adding a new feature check on `FeatureData` in `build.rs` file for every available options
\ No newline at end of file
diff --git a/data/1.52/const_char_eq_ignore_ascii_case.md b/data/1.52/const_char_eq_ignore_ascii_case.md
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--- /dev/null
+++ b/data/1.52/const_char_eq_ignore_ascii_case.md
@@ -0,0 +1,5 @@
++++
+title = "`char::eq_ignore_ascii_case` as `const fn`"
+impl_pr_id = 82078
+flag = "const_ascii_methods_on_intrinsics"
++++
diff --git a/data/1.52/const_char_len_utf16.md b/data/1.52/const_char_len_utf16.md
new file mode 100644
index 0000000..ea1388d
--- /dev/null
+++ b/data/1.52/const_char_len_utf16.md
@@ -0,0 +1,5 @@
++++
+title = "`char::len_utf16` as `const fn`"
+impl_pr_id = 82078
+flag = "const_char_len_utf"
++++
diff --git a/data/1.52/const_char_len_utf8.md b/data/1.52/const_char_len_utf8.md
new file mode 100644
index 0000000..7ff4e71
--- /dev/null
+++ b/data/1.52/const_char_len_utf8.md
@@ -0,0 +1,5 @@
++++
+title = "`char::len_utf8` as `const fn`"
+impl_pr_id = 82078
+flag = "const_char_len_utf"
++++
diff --git a/data/1.52/const_char_to_ascii_lowercase.md b/data/1.52/const_char_to_ascii_lowercase.md
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index 0000000..468c9e0
--- /dev/null
+++ b/data/1.52/const_char_to_ascii_lowercase.md
@@ -0,0 +1,5 @@
++++
+title = "`char::to_ascii_lowercase` as `const fn`"
+impl_pr_id = 82078
+flag = "const_ascii_methods_on_intrinsics"
++++
diff --git a/data/1.52/const_char_to_ascii_uppercase.md b/data/1.52/const_char_to_ascii_uppercase.md
new file mode 100644
index 0000000..8b5bdc2
--- /dev/null
+++ b/data/1.52/const_char_to_ascii_uppercase.md
@@ -0,0 +1,5 @@
++++
+title = "`char::to_ascii_uppercase` as `const fn`"
+impl_pr_id = 82078
+flag = "const_ascii_methods_on_intrinsics"
++++
diff --git a/data/1.52/const_u8_eq_ignore_ascii_case.md b/data/1.52/const_u8_eq_ignore_ascii_case.md
new file mode 100644
index 0000000..3723237
--- /dev/null
+++ b/data/1.52/const_u8_eq_ignore_ascii_case.md
@@ -0,0 +1,5 @@
++++
+title = "`u8::eq_ignore_ascii_case` as `const fn`"
+impl_pr_id = 82078
+flag = "const_ascii_methods_on_intrinsics"
++++
diff --git a/data/1.52/const_u8_to_ascii_lowercase.md b/data/1.52/const_u8_to_ascii_lowercase.md
new file mode 100644
index 0000000..630049a
--- /dev/null
+++ b/data/1.52/const_u8_to_ascii_lowercase.md
@@ -0,0 +1,5 @@
++++
+title = "`u8::to_ascii_lowercase` as `const fn`"
+impl_pr_id = 82078
+flag = "const_ascii_methods_on_intrinsics"
++++
diff --git a/data/1.52/const_u8_to_ascii_uppercase.md b/data/1.52/const_u8_to_ascii_uppercase.md
new file mode 100644
index 0000000..8436322
--- /dev/null
+++ b/data/1.52/const_u8_to_ascii_uppercase.md
@@ -0,0 +1,5 @@
++++
+title = "`u8::to_ascii_uppercase` as `const fn`"
+impl_pr_id = 82078
+flag = "const_ascii_methods_on_intrinsics"
++++