diff --git a/docs/tools/dependency_inspector.md b/docs/tools/dependency_inspector.md
index 37bd13c5ef..55e80154e7 100644
--- a/docs/tools/dependency_inspector.md
+++ b/docs/tools/dependency_inspector.md
@@ -1,3 +1,75 @@
 ## Dependency Inspector
 
-<!-- TODO(lucacasonto): write things -->
+`deno info [URL]` will inspect ES module and all of its dependencies.
+
+```shell
+deno info https://deno.land/std@0.52.0/http/file_server.ts
+Download https://deno.land/std@0.52.0/http/file_server.ts
+...
+local: /Users/deno/Library/Caches/deno/deps/https/deno.land/5bd138988e9d20db1a436666628ffb3f7586934e0a2a9fe2a7b7bf4fb7f70b98
+type: TypeScript
+compiled: /Users/deno/Library/Caches/deno/gen/https/deno.land/std@0.52.0/http/file_server.ts.js
+map: /Users/deno/Library/Caches/deno/gen/https/deno.land/std@0.52.0/http/file_server.ts.js.map
+deps:
+https://deno.land/std@0.52.0/http/file_server.ts
+  ├─┬ https://deno.land/std@0.52.0/path/mod.ts
+  │ ├─┬ https://deno.land/std@0.52.0/path/win32.ts
+  │ │ ├── https://deno.land/std@0.52.0/path/_constants.ts
+  │ │ ├─┬ https://deno.land/std@0.52.0/path/_util.ts
+  │ │ │ └── https://deno.land/std@0.52.0/path/_constants.ts
+  │ │ └─┬ https://deno.land/std@0.52.0/testing/asserts.ts
+  │ │   ├── https://deno.land/std@0.52.0/fmt/colors.ts
+  │ │   └── https://deno.land/std@0.52.0/testing/diff.ts
+  │ ├─┬ https://deno.land/std@0.52.0/path/posix.ts
+  │ │ ├── https://deno.land/std@0.52.0/path/_constants.ts
+  │ │ └── https://deno.land/std@0.52.0/path/_util.ts
+  │ ├─┬ https://deno.land/std@0.52.0/path/common.ts
+  │ │ └── https://deno.land/std@0.52.0/path/separator.ts
+  │ ├── https://deno.land/std@0.52.0/path/separator.ts
+  │ ├── https://deno.land/std@0.52.0/path/interface.ts
+  │ └─┬ https://deno.land/std@0.52.0/path/glob.ts
+  │   ├── https://deno.land/std@0.52.0/path/separator.ts
+  │   ├── https://deno.land/std@0.52.0/path/_globrex.ts
+  │   ├── https://deno.land/std@0.52.0/path/mod.ts
+  │   └── https://deno.land/std@0.52.0/testing/asserts.ts
+  ├─┬ https://deno.land/std@0.52.0/http/server.ts
+  │ ├── https://deno.land/std@0.52.0/encoding/utf8.ts
+  │ ├─┬ https://deno.land/std@0.52.0/io/bufio.ts
+  │ │ ├─┬ https://deno.land/std@0.52.0/io/util.ts
+  │ │ │ ├── https://deno.land/std@0.52.0/path/mod.ts
+  │ │ │ └── https://deno.land/std@0.52.0/encoding/utf8.ts
+  │ │ └── https://deno.land/std@0.52.0/testing/asserts.ts
+  │ ├── https://deno.land/std@0.52.0/testing/asserts.ts
+  │ ├─┬ https://deno.land/std@0.52.0/async/mod.ts
+  │ │ ├── https://deno.land/std@0.52.0/async/deferred.ts
+  │ │ ├── https://deno.land/std@0.52.0/async/delay.ts
+  │ │ └─┬ https://deno.land/std@0.52.0/async/mux_async_iterator.ts
+  │ │   └── https://deno.land/std@0.52.0/async/deferred.ts
+  │ └─┬ https://deno.land/std@0.52.0/http/_io.ts
+  │   ├── https://deno.land/std@0.52.0/io/bufio.ts
+  │   ├─┬ https://deno.land/std@0.52.0/textproto/mod.ts
+  │   │ ├── https://deno.land/std@0.52.0/io/util.ts
+  │   │ ├─┬ https://deno.land/std@0.52.0/bytes/mod.ts
+  │   │ │ └── https://deno.land/std@0.52.0/io/util.ts
+  │   │ └── https://deno.land/std@0.52.0/encoding/utf8.ts
+  │   ├── https://deno.land/std@0.52.0/testing/asserts.ts
+  │   ├── https://deno.land/std@0.52.0/encoding/utf8.ts
+  │   ├── https://deno.land/std@0.52.0/http/server.ts
+  │   └── https://deno.land/std@0.52.0/http/http_status.ts
+  ├─┬ https://deno.land/std@0.52.0/flags/mod.ts
+  │ └── https://deno.land/std@0.52.0/testing/asserts.ts
+  └── https://deno.land/std@0.52.0/testing/asserts.ts
+```
+
+Dependency inspector works with any local or remote ES modules.
+
+## Cache location
+
+`deno info` can be used to display information about cache location:
+
+```shell
+deno info
+DENO_DIR location: "/Users/deno/Library/Caches/deno"
+Remote modules cache: "/Users/deno/Library/Caches/deno/deps"
+TypeScript compiler cache: "/Users/deno/Library/Caches/deno/gen"
+```