$ pub outdated --json
{
  "packages": [
    {
      "package": "bar",
      "current": {
        "version": "1.0.1",
        "overridden": true
      },
      "upgradable": {
        "version": "1.0.1",
        "overridden": true
      },
      "resolvable": {
        "version": "1.0.1",
        "overridden": true
      },
      "latest": {
        "version": "2.0.0"
      }
    },
    {
      "package": "baz",
      "current": {
        "version": "2.0.0",
        "overridden": true
      },
      "upgradable": {
        "version": "2.0.0",
        "overridden": true
      },
      "resolvable": {
        "version": "2.0.0",
        "overridden": true
      },
      "latest": {
        "version": "2.0.0"
      }
    },
    {
      "package": "foo",
      "current": {
        "version": "1.0.1",
        "overridden": true
      },
      "upgradable": {
        "version": "1.0.1",
        "overridden": true
      },
      "resolvable": {
        "version": "1.0.1",
        "overridden": true
      },
      "latest": {
        "version": "2.0.0"
      }
    }
  ]
}

$ pub outdated --no-color
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name  Current              Upgradable           Resolvable           Latest  

direct dependencies:
bar           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   
baz           *2.0.0 (overridden)  *2.0.0 (overridden)  *2.0.0 (overridden)  2.0.0   
foo           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   

Current dependencies are constrained to versions listed in Resolvable.
A resolution compatible with the Latest versions doesn't exist, as they are not
mutually compatible.

$ pub outdated --no-color --up-to-date
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name  Current              Upgradable           Resolvable           Latest  

direct dependencies:
bar           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   
baz           *2.0.0 (overridden)  *2.0.0 (overridden)  *2.0.0 (overridden)  2.0.0   
foo           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   

Current dependencies are constrained to versions listed in Resolvable.
A resolution compatible with the Latest versions doesn't exist, as they are not
mutually compatible.

$ pub outdated --no-color --prereleases
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name  Current              Upgradable           Resolvable           Latest  

direct dependencies:
bar           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   
baz           *2.0.0 (overridden)  *2.0.0 (overridden)  *2.0.0 (overridden)  2.0.0   
foo           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   

Current dependencies are constrained to versions listed in Resolvable.
A resolution compatible with the Latest versions doesn't exist, as they are not
mutually compatible.

$ pub outdated --no-color --no-dev-dependencies
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name  Current              Upgradable           Resolvable           Latest  

direct dependencies:
bar           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   
baz           *2.0.0 (overridden)  *2.0.0 (overridden)  *2.0.0 (overridden)  2.0.0   
foo           *1.0.1 (overridden)  *1.0.1 (overridden)  *1.0.1 (overridden)  2.0.0   

Current dependencies are constrained to versions listed in Resolvable.
A resolution compatible with the Latest versions doesn't exist, as they are not
mutually compatible.

$ pub outdated --no-color --no-dependency-overrides
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name  Current              Upgradable  Resolvable  Latest  

direct dependencies:
bar           *1.0.1 (overridden)  2.0.0       2.0.0       2.0.0   
baz           *2.0.0 (overridden)  *1.0.0      2.0.0       2.0.0   
foo           *1.0.1 (overridden)  *1.0.0      *1.0.0      2.0.0   

3 upgradable dependencies are locked (in pubspec.lock) to older versions.
To update these dependencies, use `pub upgrade`.

1 dependency is constrained to a version that is older than a resolvable version.
To update it, edit pubspec.yaml.

$ pub outdated --no-color --mode=null-safety
Showing dependencies that are currently not opted in to null-safety.
[✗] indicates versions without null safety support.
[✓] indicates versions opting in to null safety.

Package Name  Current              Upgradable           Resolvable           Latest  

direct dependencies:
bar           ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗2.0.0  
baz           ✗2.0.0 (overridden)  ✗2.0.0 (overridden)  ✗2.0.0 (overridden)  ✗2.0.0  
foo           ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗2.0.0  

Current dependencies are constrained to versions listed in Resolvable.
A resolution compatible with the Latest versions doesn't exist, as they are not
mutually compatible.

$ pub outdated --no-color --mode=null-safety --no-prereleases
Showing dependencies that are currently not opted in to null-safety.
[✗] indicates versions without null safety support.
[✓] indicates versions opting in to null safety.

Package Name  Current              Upgradable           Resolvable           Latest  

direct dependencies:
bar           ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗2.0.0  
baz           ✗2.0.0 (overridden)  ✗2.0.0 (overridden)  ✗2.0.0 (overridden)  ✗2.0.0  
foo           ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗1.0.1 (overridden)  ✗2.0.0  

Current dependencies are constrained to versions listed in Resolvable.
A resolution compatible with the Latest versions doesn't exist, as they are not
mutually compatible.

$ pub outdated --json --mode=null-safety
{
  "packages": [
    {
      "package": "bar",
      "current": {
        "version": "1.0.1",
        "overridden": true,
        "nullSafety": false
      },
      "upgradable": {
        "version": "1.0.1",
        "overridden": true,
        "nullSafety": false
      },
      "resolvable": {
        "version": "1.0.1",
        "overridden": true,
        "nullSafety": false
      },
      "latest": {
        "version": "2.0.0",
        "nullSafety": false
      }
    },
    {
      "package": "baz",
      "current": {
        "version": "2.0.0",
        "overridden": true,
        "nullSafety": false
      },
      "upgradable": {
        "version": "2.0.0",
        "overridden": true,
        "nullSafety": false
      },
      "resolvable": {
        "version": "2.0.0",
        "overridden": true,
        "nullSafety": false
      },
      "latest": {
        "version": "2.0.0",
        "nullSafety": false
      }
    },
    {
      "package": "foo",
      "current": {
        "version": "1.0.1",
        "overridden": true,
        "nullSafety": false
      },
      "upgradable": {
        "version": "1.0.1",
        "overridden": true,
        "nullSafety": false
      },
      "resolvable": {
        "version": "1.0.1",
        "overridden": true,
        "nullSafety": false
      },
      "latest": {
        "version": "2.0.0",
        "nullSafety": false
      }
    }
  ]
}

$ pub outdated --json --no-dev-dependencies
{
  "packages": [
    {
      "package": "bar",
      "current": {
        "version": "1.0.1",
        "overridden": true
      },
      "upgradable": {
        "version": "1.0.1",
        "overridden": true
      },
      "resolvable": {
        "version": "1.0.1",
        "overridden": true
      },
      "latest": {
        "version": "2.0.0"
      }
    },
    {
      "package": "baz",
      "current": {
        "version": "2.0.0",
        "overridden": true
      },
      "upgradable": {
        "version": "2.0.0",
        "overridden": true
      },
      "resolvable": {
        "version": "2.0.0",
        "overridden": true
      },
      "latest": {
        "version": "2.0.0"
      }
    },
    {
      "package": "foo",
      "current": {
        "version": "1.0.1",
        "overridden": true
      },
      "upgradable": {
        "version": "1.0.1",
        "overridden": true
      },
      "resolvable": {
        "version": "1.0.1",
        "overridden": true
      },
      "latest": {
        "version": "2.0.0"
      }
    }
  ]
}