delivered the opinion of the Court.
This is a review of an order by the Circuit Court of Appeals for the Second Circuit discharging the relator McCann from custody. We accept as facts, as did the court below, those set forth in the untraversed return to the writ of habeas corpus in that court.
McCann was indicted on six counts for using the mails to defraud, in violation of § 215 of the Criminal Code, 18 U. S. C. § 338. From the time of his arraignment on February 18,1941, to the prosecution of his appeal in the court below, McCann insisted on conducting his case without the assistance of a lawyer. When called upon to plead to the indictment, he refused to do- so; a plea of not guilty was entered on his behalf. The District Court at that time advised McCann to retain counsel. He refused, however, “stating in substance that he desired to represent himself, that the case was very complicated, and that he was so familiar with its details that no attorney would be able to give him as competent representation as he would be able to give himself.”
When the case came on for trial on July 7, 1941, Mc-Cann repeated, in reply to the judge’s inquiry whether he had counsel, that he wished to represent himself. In response to the court’s further inquiry whether he was admitted to the bar, McCann “replied that he was not, but that he had studied law, and was sufficiently familiar therewith adequately to defend himself, and was more familiar with the complicated facts of his case than any attorney could ever be.”1 McCann “then moved to have *271the case tried without a jury by the judge alone. There was a brief discussion between the Court, the petitioner, and the Assistant United States Attorney,” after which McCann submitted the following over his signature: “I, Gene McCann, the defendant herein, appearing personally, do hereby waive a trial by jury in the above entitled case, having been advised by the Court of my constitutional right.” The Assistant United States Attorney consented, and the judge (one of long trial experience and tested solicitude for the civilized administration of criminal justice) entered an order approving this “waiver.”
The trial then got under way. It lasted for two weeks and a half, and throughout the entire proceedings McCann represented himself. He was convicted on July 22, 1941, and was sentenced to imprisonment for six years and to pay a fine of $600. He took an appeal, and the trial judge fixed bail at $10,000. Being unable to procure this sum, he remained in custody. Then followed applications to the Circuit Court of Appeals, likewise pressed by McCann himself, for extending the time for filing a bill of exceptions. In these proceedings both the trial and appellate courts again suggested to McCann the advisability of being represented by counsel. After having personally made these numerous applications, McCann finally secured the assistance of an attorney. The latter applied to the Circuit Court of Appeals for reduction of bail. It was so reduced. But at the same time the court suggested that McCann take out a writ of habeas corpus, returnable to the court, to raise the question whether, in the circumstances of the case, “the judge had jurisdiction to try him.”
As is pointed out in the opinion of the Circuit Court of Appeals, “At no time did he [McCann] indicate that *272he wished a jury or that he repented of his consent'— either while the cause was in the District Court or in this court — until the attorney, who now represents him, in March, 1942, raised the point” at the court’s invitation. The “point” thus projected into the case by the Circuit Court of Appeals was presented, in its own words, “in the barest possible form: Has an accused, who is without counsel, the power at his own instance to surrender his right of trial by jury when indicted for felony?” 2 The Circuit Court of Appeals, with one judge dissenting, answered this question in the negative. It held that no person accused of a felony — who is himself not a lawyer — can waive trial by a jury, no matter how capable he is of making an intelligent, informed choice and how strenuously he insists upon such a choice, unless he does so upon the advice of an attorney. 126 F. 2d 774. The obvious importance of this question to the administration of criminal justice in the federal courts led us to bring the case here. 316 U. S. 655.
A jurisdictional obstacle to a consideration of this issue is pressed before us. It is urged that the Circuit Court of Appeals had no jurisdiction to issue the writ of habeas corpus in this case. The discussion of this question .took an extended range in the arguments at the bar, but in the circumstances of this case the matter lies within a narrow compass. Uninterruptedly from the first Judiciary Act (§ 14 of the Act of September 24, 1789, 1 Stat. 73, 81) to the present day (§ 262 of the Judicial Code, 28 U. S. C. § 377), the courts of the United States have had powers of an auxiliary nature “to issue all writs not specifically provided for by statute, which may be necessary for the *273exercise of their respective jurisdictions, and agreeable to the usages and principles of law.” In Whitney v. Dick, 202 U. S. 132, this Court held that where no proceeding of an appellate character is pending in a Circuit Court of Appeals, the authority to issue auxiliary writs does not come into operation. A circuit court of appeals cannot issue the writ of habeas corpus as “an independent and original proceeding challenging in toto the validity of a judgment rendered in another court.” But the Court also recognized that there was power to issue the writ “where it may be necessary for the exercise of a jurisdiction already existing.” 202 U. S. at 136-37. In the case at bar, a proceeding of an appellate character was pending in the Circuit Court of Appeals, for McCann had already filed an appeal from the judgment of conviction. There was, therefore, “a jurisdiction already existing” in the Circuit Court of Appeals. But could the issuance of the writ be deemed “necessary for the exercise” of that jurisdiction?
Procedural instruments are means for achieving the rational ends of law. A Circuit Court of Appeals is not limited to issuing a writ of habeas corpus only when it finds that it is “necessary” in the sense that the court could not otherwise physically discharge its appellate duties. Unless appropriately confined by Congress, a federal court may avail itself of all auxiliary writs as aids in the performance of its duties, when the use of such historic aids is calculated in its sound judgment to achieve the ends of justice entrusted to it. Undoubtedly, therefore, the Circuit Court of Appeals had “jurisdiction,” in the sense that it had the power, to issue the writ as an incident to the appeal then pending before it. The real question is whether the Circuit Court of Appeals abused its power in exercising that jurisdiction in the situation that confronted it.
*274Of course the writ of habeas corpus should not do service for an appeal. Glasgow v. Moyer, 225 U. S. 420, 428; Matter of Gregory, 219 U. S. 210, 213. This rule must be strictly observed if orderly appellate procedure is to be maintained. Mere convenience cannot justify use of the writ as a substitute for an appeal. But dry formalism should not sterilize procedural resources which Congress has made available to the federal courts. In exceptional cases where, because of special circumstances, its use as an aid to an appeal over which the court has jurisdiction may fairly be said to be reasonably necessary in the interest of justice, the writ of habeas corpus is available to a circuit court of appeals.
The circumstances that moved the court below to the exercise of its jurisdiction were the peculiar difficulties involved in preparing a bill of exceptions. The stenographic minutes had never been typed. The relator claimed that he was without funds. Since he was unable to raise the bail fixed by the trial judge, he had been in custody since sentence and therefore had no opportunity to prepare a bill of exceptions. The court doubted “whether any [bill] can ever be made up on which the appeal can be heard . . . In the particular circumstances of the case at bar, it seems to us that the writ is ‘necessary to the complete exercise' of our appellate jurisdiction because . . . there is a danger that it cannot be otherwise exercised at all and a certainty that it must in any event be a good deal hampered.”
The court below recognized, however, that a bill of exceptions might be prepared which would be confined to the single point raised by the writ of habeas corpus. This is the basis for the contention that the writ of habeas corpus in this case performs the function of an appeal. But inasmuch as McCann was urging a number of grounds for the reversal of his conviction, including the sufficiency of the evidence, the Circuit Court of Appeals was justified *275in concluding that it would not be fair to make him stake his whole appeal on the single point raised by this writ. We cannot say that the court was unreasonable in the view it took of the situation with which it was presented and with which it was more familiar than the printed record alone can reveal. The writ of habeas corpus was not a substitute for the pending appeal, and was therefore not improvidently entertained by the court below.
This brings us to the merits. They are controlled in principle by Patton v. United States, 281 U. S. 276, and Johnson v. Zerbst, 304 U. S. 458. The short of the matter is that an accused, in the exercise of a free and intelligent choice, and with the considered approval of the court, may waive trial by jury, and so likewise may he competently and intelligently waive his Constitutional right to assistance of counsel. There is nothing in the Constitution to prevent an accused from choosing to have his fate tried before a judge without a jury even though, in deciding what is best for himself, he follows the guidance of his own wisdom and not that of a lawyer. In taking a contrary view, the court below appears to have been largely influenced by the radiations of this Court’s opinion in Glasser v. United States, 315 U. S. 60. But Patton v. United States, supra, and Johnson v. Zerbst, supra, were left wholly unimpaired by the ruling in the Glasser case.
Certain safeguards are essential to criminal justice. The court must be uncoerced, Moore v. Dempsey, 261 U. S. 86, and it must have no interest other than the pursuit of justice, Tumey v. Ohio, 273 U. S. 510. The accused must have ample opportunity to meet the case of the prosecution. To that end, the Sixth Amendment of the Constitution abolished the rigors of the common law by affording one charged with crime the assistance of counsel for his defense, Johnson v. Zerbst, 304 U. S. 458. Such assistance “in the particular situation” of “ignorant de*276fendants in a capital case” led to recognition that “the benefit of counsel was essential to the substance of a hearing,” as guaranteed by the Due Process Clause of the Fourteenth Amendment, in criminal prosecutions in the state courts. Palko v. Connecticut, 302 U. S. 319, 327. Compare Powell v. Alabama, 287 U. S. 45, and Betts v. Brady, 316 U. S. 455. The relation of trial by jury to civil rights — especially in criminal cases — is fully revealed by the history which gave rise to the provisions of the Constitution which guarantee that right. Article III, § 2, paragraph 3; Sixth Amendment; Seventh Amendment. That history is succinctly summarized in the Declaration of Independence, in which complaint was made that the Colonies were deprived, “in many cases, of the benefits of Trial by Jury.” But procedural devices rooted in experience were written into the Bill of Rights not as abstract rubrics in an elegant code but in order to assure fairness and justice before any person could be deprived of “life, liberty or property.”
It hardly occurred to the framers of the original Constitution and of the Bill of Rights that an accused, acting in obedience to the dictates of self-interest or the promptings of conscience, should be prevented from surrendering his liberty by admitting his guilt. The Constitution does not compel an accused who admits his guilt to stand trial against his own wishes. Legislation apart, no social policy calls for the adoption by the courts of an inexorable rule that guilt must be determined only by trial and not by admission. A plea of guilt expresses the defendant’s belief that his acts were proscribed by law and that he cannot successfully be defended. It is true, of course, that guilt under § 215 of the Criminal Code, which makes it a crime to use the mails to defraud, depends upon answers to questions of law raised by application of the *277statute to particular facts. It is equally true that prosecutions under other provisions of the Criminal Code may raise even more difficult and complex questions of law. But such questions are no less absent when a man pleads guilty than when he resists an accusation of crime. And not even now is it suggested that a layman cannot plead guilty unless he has the opinion of a lawyer on the questions of law that might arise if he did not admit his guilt. Plainly, the engrafting of such a requirement upon the Constitution would be a gratuitous dislocation of the processes of justice. The task of judging the competence of a particular accused cannot be escaped by announcing delusively simple rules of trial procedure which judges must mechanically follow. The question in each case is whether the accused was competent to exercise an intelligent,, informed judgment — and for determination of this question it is of course relevant whether he had the advice of counsel. But it is quite another matter to suggest that the Constitution unqualifiedly deems an accused incompetent unless he does have the advice of counsel. If a layman is to be precluded from defending himself because the Constitution is said to make him helpless without a lawyer’s assistance on questions of law which abstractly underlie all federal criminal prosecutions, it ought not to matter whether the decision he is called upon to make is that of pleading guilty or of waiving a particular mode of trial. Every conviction, including the considerable number based upon pleas of guilty, presupposes at least a tacit disposition of the legal questions involved.
We have already held that one charged with a serious federal crime may dispense with his Constitutional right to jury trial, where this action is taken with his express, intelligent consent, where the Government also consents, and where such action is approved by the responsible judg*278ment of the trial court. Patton v. United States, 281 U. S. 276.3 And whether or not there is an intelligent, competent, self-protecting waiver of jury trial by an accused must depend upon the unique circumstances of each case. The less rigorous enforcement of the rules of evidence, the greater informality in trial procedure — these are not the only advantages that the absence of a jury may afford to a layman who prefers to make his own defense. In a variety of subtle ways trial by jury may be restrictive of a layman’s opportunities to present his case as freely as he wishes. And since trial by jury confers burdens as well as benefits, an accused should be permitted to forego its privileges when his competent judgment counsels him that his interests are safer in the keeping of the judge than of the jury.
But we are asked here to hold that an accused person cannot waive trial by jury, no matter how freely and understandingly he surrenders that right, unless he acts on a lawyer’s advice. In other words, although a shrewd and experienced layman may, for his own sufficient reasons, conduct his own defense if he prefers to do so, nevertheless if he does do so the Constitution requires that he must defend himself before a jury and not before a judge. But we find nothing in the Constitution, or in the great historic events which gave rise to it, or the history to which it has given rise, to justify such interpolation into the Consti*279tution and such restriction upon the rational administration of criminal justice.
The right to assistance of counsel and the correlative right to dispense with a lawyer’s help are not legal formalisms. They rest on considerations that go to the substance of an accused’s position before the law. The public conscience must be satisfied that fairness dominates the administration of justice. An accused must have the means of presenting his best defense. He must have time and facilities for investigation and for the production of evidence. But evidence and truth are of no avail unless they can be adequately presented. Essential fairness is lacking if an accused cannot put his case effectively in court. But the Constitution does not force a lawyer upon a defendant. He may waive his Constitutional right to assistance of counsel if he knows what he is doing and his choice is made with eyes open. Johnson v. Zerbst, 304 U. S. 458, 468-69.
Referring to jury trials, Mr. Justice Cardozo, speaking for the Court, had occasion to say, “Few would be so narrow or provincial as to maintain that a fair and enlightened system of justice would be impossible without them.” Palko v. Connecticut, 302 U. S. at 325. Putting this thought in more generalized form, the procedural safeguards of the Bill of Rights are not to be treated as mechanical rigidities. What were contrived as protections for the accused should not be turned into fetters. To assert as an absolute that a layman, no matter how wise or experienced he may be, is incompetent to choose between judge and jury as the tribunal for determining his guilt or innocence, simply because a lawyer has not advised him on the choice, is to dogmatize beyond the bounds of learning or experience. Were we so to hold, we would impliedly condemn the administration of criminal justice in States deemed otherwise enlightened, merely *280because in their courts the vast majority of criminal cases are tried before a judge without a jury. To deny an accused a choice of procedure in circumstances in which he, though a layman, is as capable as any lawyer of making an intelligent choice, is to impair the worth of great Constitutional safeguards by treating them as empty verbalisms.
Underlying such dogmatism is distrust of the ability of courts to accommodate judgment to the varying circumstances of individual cases. But this is to express want of faith in the very tribunals which are charged with enforcement of the Constitution. “Universal distrust,” Mr. Justice Holmes admonished us, “creates universal incompetence.” Graham v. United States, 231 U. S. 474, 480. When the administration of the criminal law in the federal courts is hedged about as it is by the Constitutional safeguards for the protection of an accused, to deny him in the exercise of his free choice the right to dispense with some of these safeguards (when such surrenders are as jealously guarded as they are by our rulings in Patton v. United States, supra, and Johnson v. Zerbst, supra), and to base such denial on an arbitrary rule that a man cannot choose to conduct his defense before a judge rather than a jury unless, against his will, he has a lawyer to advise him, although he reasonably deems himself the best ad-visor for his own needs, is to imprison a man in his privileges and call it the Constitution. For it is neither obnoxious to humane standards for the administration of justice as these have been written into the Constitution, nor violative of the rights of any person accused of crime who is capable of weighing his own best interest, to permit him to conduct his own defense in a trial before a judge without a jury, subject as such trial is to public scrutiny and amenable as it is to the corrective oversight of an appellate tribunal and ultimately of the Supreme Court of the Nation.
*281Once we reject such a doctrinaire view of criminal justice and of the Constitution, there is an end to this case. The Patton decision left no room for doubt that a determination of guilt by a court after waiver of jury trial could not be set aside and a new trial ordered except upon a plain showing that such waiver was not freely and intelligently madé. If the result of the adjudicatory process is not to be set at naught, it is not asking too much that the burden of showing essential unfairness be sustained by him who claims such injustice and seeks to have the result set aside, and that it be sustained not as a matter of speculation but as a demonstrable reality. Simply because a result that was insistently invited, namely, a verdict by a court without a jury, disappointed the hopes of the accused, ought not to be sufficient for rejecting it. And if the record before us does not show an intelligent and competent waiver of the right to the assistance of counsel by a defendant who demanded again and again that the judge try him, and who in his persistence of such a choice knew what he was about, it would be difficult to conceive of a set of circumstances in which there was such a free choice by a self-determining individual.
The order of the Circuit Court of Appeals must therefore be set aside and the cause remanded to that court for such further proceedings, not inconsistent with this opinion, as may be appropriate.
So ordered.
McCann had brought suit in 1933 against the New York Stock Exchange, its officers and members, the Better Business Bureau of New York, and a large number of other persons, seeking thirty million dollars damages for conspiracy in restraint of trade. He represented himself in this extensive litigation, and personally brought appeals to *271the Circuit Court of Appeals and to this Court. See McCann v New York Stock Exchange, 80 F. 2d 211; 107 F. 2d 908; 309 U. S. 684.
Felony, it may not be irrelevant to note, is a verbal survival which has been emptied of its historic content. Under the federal Criminal Code all offenses punishable by death or imprisonment for more than a year are felonies. § 335 of the Criminal Code, 18 U. S. C. § 541.
The ruling of the Patton case, namely, that the provisions of the Constitution dealing with trial by jury in the federal courts were “meant to confer a right upon the accused which he may forego at his election,” 281 U. S. at 298, was expressly recognized and acted upon by Congress in the Act of March 8, 1934, c. 49, 48 Stat. 399, which empowered the Supreme Court to prescribe rules of practice and procedure with respect to “proceedings after verdict, or finding of guilt by the court if a jury has been waived, or plea of guilty, in criminal cases in district courts of the United States. . . .” (Italics added.) Compare H. Rep. No. 858, Sen. Rep. No. 257, 73d Cong., 2d Sess.