diff --git a/rinja/src/error.rs b/rinja/src/error.rs
index 25c195b6..e0648394 100644
--- a/rinja/src/error.rs
+++ b/rinja/src/error.rs
@@ -1,6 +1,7 @@
 use std::convert::Infallible;
 use std::fmt::{self, Display};
 
+/// The [`Result`](std::result::Result) type with [`Error`] as default error type
 pub type Result<I, E = Error> = std::result::Result<I, E>;
 
 /// rinja error type
diff --git a/rinja/src/filters/escape.rs b/rinja/src/filters/escape.rs
index b2ba0a17..3f4f0012 100644
--- a/rinja/src/filters/escape.rs
+++ b/rinja/src/filters/escape.rs
@@ -108,8 +108,10 @@ impl Escaper for Text {
 /// E.g. in an [`Html`] context, any and all generated text can be used in HTML/XML text nodes and
 /// attributes, without for for maliciously injected data.
 pub trait Escaper: Copy {
+    /// Escaped the input string `string` into `fmt`
     fn write_escaped_str<W: Write>(&self, fmt: W, string: &str) -> fmt::Result;
 
+    /// Escaped the input char `c` into `fmt`
     #[inline]
     fn write_escaped_char<W: Write>(&self, fmt: W, c: char) -> fmt::Result {
         self.write_escaped_str(fmt, c.encode_utf8(&mut [0; 4]))
@@ -118,9 +120,12 @@ pub trait Escaper: Copy {
 
 /// Used internally by rinja to select the appropriate escaper
 pub trait AutoEscape {
+    /// The wrapped or converted result type
     type Escaped: fmt::Display;
+    /// Early error testing for the input value, usually [`Infallible`]
     type Error: Into<crate::Error>;
 
+    /// Used internally by rinja to select the appropriate escaper
     fn rinja_auto_escape(&self) -> Result<Self::Escaped, Self::Error>;
 }
 
@@ -132,6 +137,7 @@ pub struct AutoEscaper<'a, T: ?Sized, E> {
 }
 
 impl<'a, T: ?Sized, E> AutoEscaper<'a, T, E> {
+    /// Used internally by rinja to select the appropriate escaper
     #[inline]
     pub fn new(text: &'a T, escaper: E) -> Self {
         Self { text, escaper }
@@ -214,7 +220,9 @@ impl<'a, T: HtmlSafe + ?Sized> AutoEscape for &AutoEscaper<'a, T, Html> {
 /// );
 /// ```
 pub enum MaybeSafe<T> {
+    /// The contained value does not need escaping
     Safe(T),
+    /// The contained value needs to be escaped
     NeedsEscaping(T),
 }
 
@@ -424,6 +432,7 @@ pub struct Writable<'a, S: ?Sized>(pub &'a S);
 
 /// Used internally by rinja to select the appropriate [`write!()`] mechanism
 pub trait WriteWritable {
+    /// Used internally by rinja to select the appropriate [`write!()`] mechanism
     fn rinja_write<W: fmt::Write + ?Sized>(&self, dest: &mut W) -> fmt::Result;
 }
 
@@ -431,6 +440,7 @@ pub trait WriteWritable {
 ///
 /// Types implementing this trait can be written without needing to employ an [`fmt::Formatter`].
 pub trait FastWritable {
+    /// Used internally by rinja to speed up writing some types.
     fn write_into<W: fmt::Write + ?Sized>(&self, dest: &mut W) -> fmt::Result;
 }
 
diff --git a/rinja/src/filters/json.rs b/rinja/src/filters/json.rs
index 48bdbcb5..debada2e 100644
--- a/rinja/src/filters/json.rs
+++ b/rinja/src/filters/json.rs
@@ -55,7 +55,15 @@ struct ToJsonPretty<S, I> {
     indent: I,
 }
 
+/// A prefix usable for indenting [prettified JSON data](json_pretty)
+///
+/// ```
+/// # use rinja::filters::AsIndent;
+/// assert_eq!(4.as_indent(), "    ");
+/// assert_eq!(" -> ".as_indent(), " -> ");
+/// ```
 pub trait AsIndent {
+    /// Borrow `self` as prefix to use.
     fn as_indent(&self) -> &str;
 }
 
diff --git a/rinja/src/lib.rs b/rinja/src/lib.rs
index a3012e3f..3e168080 100644
--- a/rinja/src/lib.rs
+++ b/rinja/src/lib.rs
@@ -57,6 +57,7 @@
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
 #![deny(elided_lifetimes_in_paths)]
 #![deny(unreachable_pub)]
+#![deny(missing_docs)]
 
 mod error;
 pub mod filters;