$ pub outdated --json
Resolving...
{
  "packages": [
    {
      "package": "bar",
      "current": "1.0.0",
      "upgradable": "1.0.0",
      "resolvable": "1.0.0",
      "latest": "2.0.0"
    },
    {
      "package": "foo",
      "current": "1.0.0",
      "upgradable": "1.0.0",
      "resolvable": "1.0.0",
      "latest": "2.0.0"
    }
  ]
}

$ pub outdated --no-color
Resolving...
Dependencies  Current  Upgradable  Resolvable  Latest  
bar           *1.0.0   *1.0.0      *1.0.0      2.0.0   
foo           *1.0.0   *1.0.0      *1.0.0      2.0.0   

dev_dependencies: all up-to-date

transitive dependencies: all up-to-date

transitive dev_dependencies: all up-to-date

Dependencies are all on the latest resolvable versions.
Newer versions, while available, are not mutually compatible.

$ pub outdated --no-color --mark=none
Resolving...
Dependencies  Current  Upgradable  Resolvable  Latest  
bar           1.0.0    1.0.0       1.0.0       2.0.0   
foo           1.0.0    1.0.0       1.0.0       2.0.0   

dev_dependencies: all up-to-date

transitive dependencies: all up-to-date

transitive dev_dependencies: all up-to-date

Dependencies are all on the latest resolvable versions.
Newer versions, while available, are not mutually compatible.

$ pub outdated --no-color --up-to-date
Resolving...
Dependencies  Current  Upgradable  Resolvable  Latest  
bar           *1.0.0   *1.0.0      *1.0.0      2.0.0   
foo           *1.0.0   *1.0.0      *1.0.0      2.0.0   

dev_dependencies: all up-to-date

transitive dependencies: all up-to-date

transitive dev_dependencies: all up-to-date

Dependencies are all on the latest resolvable versions.
Newer versions, while available, are not mutually compatible.

$ pub outdated --no-color --pre-releases
Resolving...
Dependencies  Current  Upgradable  Resolvable  Latest  
bar           *1.0.0   *1.0.0      *1.0.0      2.0.0   
foo           *1.0.0   *1.0.0      *1.0.0      2.0.0   

dev_dependencies: all up-to-date

transitive dependencies: all up-to-date

transitive dev_dependencies: all up-to-date

Dependencies are all on the latest resolvable versions.
Newer versions, while available, are not mutually compatible.

$ pub outdated --no-color --no-dev-dependencies
Resolving...
Dependencies  Current  Upgradable  Resolvable  Latest  
bar           *1.0.0   *1.0.0      *1.0.0      2.0.0   
foo           *1.0.0   *1.0.0      *1.0.0      2.0.0   

transitive dependencies: all up-to-date

Dependencies are all on the latest resolvable versions.
Newer versions, while available, are not mutually compatible.