Codex Washingtonianus, Codex Washingtonensis, Codex Freerianus, also called the Washington Manuscript of the Gospels, The Freer Gospel and The Freer Codex, is a Greek uncial manuscript of the four Gospels, written on parchment. It is designated by W or 032 in the Gregory-Aland numbering of New Testament manuscripts, and ε014 in the von Soden numbering of New Testament manuscripts. Using the study of comparative writing styles (palaeography), it has been dated to the 4th or 5th century. The manuscript has some gaps. The manuscript was among a collection of manuscripts bought by American industrialist Charles Lang Freer at the start of the 20th century, and first published by biblical scholar Henry A. Sanders.

It has been described as one of the "more important majuscule manuscripts discovered during the 20th century", and "a highly valuable manuscript." In the Gospel of Mark, it shares several distinctive readings with the early 3rd century papyrus, the Chester Beatty codex of the Gospels and Acts (𝔓⁴⁵). It is considered to be the third oldest Gospel parchment codex in the world.

The manuscript is a codex (precursor to the modern book), containing most of the text of the four Gospels written on 187 parchment leaves (sized 20.5–21 cm by 13–14.5 cm), with painted wooden covers. John 1:1-5:11 is a replacement of a presumably damaged folio, and dates to around the 7th century. Mark 15:13-38 and John 14:26-16:7 are lacking. The text is written in one column per page, 30 lines per page. The letters are written in a small, slightly sloping uncial hand, using dark-brown ink. The words are written continuously without separation. Accents (used to indicate voiced pitch changes) are absent, and the rough breathing mark (utilised to designate vowel emphasis) is written very rarely. There are numerous corrections made by the original copyist and a few corrections dating to the late 5th or 6th century. The copyist has been described as "generally a careful worker", who produced "extremely few nonsense readings" and had very few "other indicators of careless copying." As with Codex Bezae (D), the Gospels follow in the so-called "Western" order: Matthew, John, Luke, Mark.

The nomina sacra (special names/words considered sacred in Christianity, abbreviated usually with the first and last letter, and notified with an overline) are employed throughout the manuscript. The following list is of the nominative case (subject) forms utilised: ΘΣ (θεος / God); ΚΣ (κυριος / Lord); ΧΡΣ (χριστος / Christ/Messiah); ΙΣ (Ιησους / Jesus); ΠΝΑ (πνευμα / spirit); ΑΝΟΣ (ανθρωπος / man); ΠΗΡ (πατηρ / father); ΜΗΡ (μητηρ / mother); ΥΣ (υιος / son); ΔΑΔ, (Δαυιδ / David; ΔΔ once); ΙΗΛ (Ισραηλ / Israel; ΙΣΡΛ once).

The text of the codex is considered to be an admixture of different text-types. It is a "consistently cited witness of the first order" in the critical apparatus of the Nestle-Aland Novum Testamentum Graece (a critical edition of the Greek New Testament). Due to different sections of the text displaying affinities with multiple text-types, the codex has been hypothesised to have been copied from several different manuscripts, possibly pieced together from manuscripts which survived the persecution of Christians by the Emperor Diocletian. The text-types are groups of different New Testament manuscripts which share specific or generally related readings, which then differ from each other group, and thus the conflicting readings can separate out the groups. These are then used to determine the original text as published; there are three main groups with names: Alexandrian, Western, and Byzantine. The text-types of the different sections are as follows:

The Caesarean text-type mentioned above (initially identified by biblical scholar Burnett Hillman Streeter) has been contested by several text-critics, such as Kurt and Barbara Aland. Kurt Aland placed the codex in Category III of his New Testament manuscript classification system. Category III manuscripts are described as having "a small but not a negligible proportion of early readings, with a considerable encroachment of [Byzantine] readings, and significant readings from other sources as yet unidentified."

Matthew 16:2b–3 is present and not marked as doubtful or spurious. Luke 22:43-44, John 5:4 and the Pericope de adultera are not present in the manuscript. It lacks Matthew 5:21–22 (like Minuscule 33), and Luke 19:25 (as D, 69, some lectionaries, and other manuscripts). It includes Matthew 23:14 as in most other manuscripts of the Byzantine text-type.

There is a subscription at the end of the Gospel of Mark, written in semi-cursive from the 5th century: "Holy Christ, be you with your servant Timothy and all of his." The similar note appears in Minuscule 579. Textual critic Hermann von Soden cited a number of similar subscriptions in other manuscripts.