What is a disposable temporary email?

A disposable temporary email is a short-lived email address used to protect your primary inbox from spam. It requires no registration and expires automatically, keeping your identity safe.

Is testsmail completely free and safe?

Yes, testsmail is 100% free and prioritizes user privacy. We do not store personal data and emails are deleted after a temporary period.

Does testsmail offer professional tools?

Yes! Beyond disposable email, we offer a professional Resume Maker, HTML Viewer, JSON Formatter, JWT Debugger, Regex Tester, Password Generator, QR Code Generator, and 200+ other free productivity tools for developers and job seekers.

Can I get a private email inbox on my own domain with testsmail?

Yes. With a free testsmail account you can switch to Private mode and route mail to your private inbox by adding the X-Applied-Token header to your outgoing messages. Private mail is stored end-to-end encrypted and only visible to you.

Can I auto-forward my disposable emails to my real email address?

Yes. In your profile you can set a verified forwarding address, and testsmail will automatically forward mail from your private inbox to your real email so you never miss an important message while keeping your real address hidden.

Does testsmail have a developer API for automated testing?

Yes. testsmail provides a developer API key for programmatic access to your inbox, making it ideal for QA automation, CI/CD pipelines, and testing sign-up, OTP, and verification email flows.

Is testsmail good for receiving OTP and verification codes?

Yes. Emails arrive in your testsmail inbox instantly, so it is ideal for receiving one-time passwords (OTP), verification links, and confirmation codes when signing up for websites and apps without exposing your personal email.

ASCII Table - Decimal, Hex & Octal Character Codes

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Showing 128 of 128 entries

Decimal	Hex	Octal	Char	Description
`0`	`0x00`	`00`	`NUL`	Control character (NUL)
`1`	`0x01`	`01`	`SOH`	Control character (SOH)
`2`	`0x02`	`02`	`STX`	Control character (STX)
`3`	`0x03`	`03`	`ETX`	Control character (ETX)
`4`	`0x04`	`04`	`EOT`	Control character (EOT)
`5`	`0x05`	`05`	`ENQ`	Control character (ENQ)
`6`	`0x06`	`06`	`ACK`	Control character (ACK)
`7`	`0x07`	`07`	`BEL`	Control character (BEL)
`8`	`0x08`	`010`	`BS`	Control character (BS)
`9`	`0x09`	`011`	`TAB`	Control character (TAB)
`10`	`0x0A`	`012`	`LF`	Control character (LF)
`11`	`0x0B`	`013`	`VT`	Control character (VT)
`12`	`0x0C`	`014`	`FF`	Control character (FF)
`13`	`0x0D`	`015`	`CR`	Control character (CR)
`14`	`0x0E`	`016`	`SO`	Control character (SO)
`15`	`0x0F`	`017`	`SI`	Control character (SI)
`16`	`0x10`	`020`	`DLE`	Control character (DLE)
`17`	`0x11`	`021`	`DC1`	Control character (DC1)
`18`	`0x12`	`022`	`DC2`	Control character (DC2)
`19`	`0x13`	`023`	`DC3`	Control character (DC3)
`20`	`0x14`	`024`	`DC4`	Control character (DC4)
`21`	`0x15`	`025`	`NAK`	Control character (NAK)
`22`	`0x16`	`026`	`SYN`	Control character (SYN)
`23`	`0x17`	`027`	`ETB`	Control character (ETB)
`24`	`0x18`	`030`	`CAN`	Control character (CAN)
`25`	`0x19`	`031`	`EM`	Control character (EM)
`26`	`0x1A`	`032`	`SUB`	Control character (SUB)
`27`	`0x1B`	`033`	`ESC`	Control character (ESC)
`28`	`0x1C`	`034`	`FS`	Control character (FS)
`29`	`0x1D`	`035`	`GS`	Control character (GS)
`30`	`0x1E`	`036`	`RS`	Control character (RS)
`31`	`0x1F`	`037`	`US`	Control character (US)
`32`	`0x20`	`040`	`SP`	Space
`33`	`0x21`	`041`	`!`	Printable character
`34`	`0x22`	`042`	`"`	Printable character
`35`	`0x23`	`043`	`#`	Printable character
`36`	`0x24`	`044`	`$`	Printable character
`37`	`0x25`	`045`	`%`	Printable character
`38`	`0x26`	`046`	`&`	Printable character
`39`	`0x27`	`047`	`'`	Printable character
`40`	`0x28`	`050`	`(`	Printable character
`41`	`0x29`	`051`	`)`	Printable character
`42`	`0x2A`	`052`	`*`	Printable character
`43`	`0x2B`	`053`	`+`	Printable character
`44`	`0x2C`	`054`	`,`	Printable character
`45`	`0x2D`	`055`	`-`	Printable character
`46`	`0x2E`	`056`	`.`	Printable character
`47`	`0x2F`	`057`	`/`	Printable character
`48`	`0x30`	`060`	`0`	Printable character
`49`	`0x31`	`061`	`1`	Printable character
`50`	`0x32`	`062`	`2`	Printable character
`51`	`0x33`	`063`	`3`	Printable character
`52`	`0x34`	`064`	`4`	Printable character
`53`	`0x35`	`065`	`5`	Printable character
`54`	`0x36`	`066`	`6`	Printable character
`55`	`0x37`	`067`	`7`	Printable character
`56`	`0x38`	`070`	`8`	Printable character
`57`	`0x39`	`071`	`9`	Printable character
`58`	`0x3A`	`072`	`:`	Printable character
`59`	`0x3B`	`073`	`;`	Printable character
`60`	`0x3C`	`074`	`<`	Printable character
`61`	`0x3D`	`075`	`=`	Printable character
`62`	`0x3E`	`076`	`>`	Printable character
`63`	`0x3F`	`077`	`?`	Printable character
`64`	`0x40`	`0100`	`@`	Printable character
`65`	`0x41`	`0101`	`A`	Printable character
`66`	`0x42`	`0102`	`B`	Printable character
`67`	`0x43`	`0103`	`C`	Printable character
`68`	`0x44`	`0104`	`D`	Printable character
`69`	`0x45`	`0105`	`E`	Printable character
`70`	`0x46`	`0106`	`F`	Printable character
`71`	`0x47`	`0107`	`G`	Printable character
`72`	`0x48`	`0110`	`H`	Printable character
`73`	`0x49`	`0111`	`I`	Printable character
`74`	`0x4A`	`0112`	`J`	Printable character
`75`	`0x4B`	`0113`	`K`	Printable character
`76`	`0x4C`	`0114`	`L`	Printable character
`77`	`0x4D`	`0115`	`M`	Printable character
`78`	`0x4E`	`0116`	`N`	Printable character
`79`	`0x4F`	`0117`	`O`	Printable character
`80`	`0x50`	`0120`	`P`	Printable character
`81`	`0x51`	`0121`	`Q`	Printable character
`82`	`0x52`	`0122`	`R`	Printable character
`83`	`0x53`	`0123`	`S`	Printable character
`84`	`0x54`	`0124`	`T`	Printable character
`85`	`0x55`	`0125`	`U`	Printable character
`86`	`0x56`	`0126`	`V`	Printable character
`87`	`0x57`	`0127`	`W`	Printable character
`88`	`0x58`	`0130`	`X`	Printable character
`89`	`0x59`	`0131`	`Y`	Printable character
`90`	`0x5A`	`0132`	`Z`	Printable character
`91`	`0x5B`	`0133`	`[`	Printable character
`92`	`0x5C`	`0134`	`\`	Printable character
`93`	`0x5D`	`0135`	`]`	Printable character
`94`	`0x5E`	`0136`	`^`	Printable character
`95`	`0x5F`	`0137`	`_`	Printable character
`96`	`0x60`	`0140`	`	Printable character
`97`	`0x61`	`0141`	`a`	Printable character
`98`	`0x62`	`0142`	`b`	Printable character
`99`	`0x63`	`0143`	`c`	Printable character
`100`	`0x64`	`0144`	`d`	Printable character
`101`	`0x65`	`0145`	`e`	Printable character
`102`	`0x66`	`0146`	`f`	Printable character
`103`	`0x67`	`0147`	`g`	Printable character
`104`	`0x68`	`0150`	`h`	Printable character
`105`	`0x69`	`0151`	`i`	Printable character
`106`	`0x6A`	`0152`	`j`	Printable character
`107`	`0x6B`	`0153`	`k`	Printable character
`108`	`0x6C`	`0154`	`l`	Printable character
`109`	`0x6D`	`0155`	`m`	Printable character
`110`	`0x6E`	`0156`	`n`	Printable character
`111`	`0x6F`	`0157`	`o`	Printable character
`112`	`0x70`	`0160`	`p`	Printable character
`113`	`0x71`	`0161`	`q`	Printable character
`114`	`0x72`	`0162`	`r`	Printable character
`115`	`0x73`	`0163`	`s`	Printable character
`116`	`0x74`	`0164`	`t`	Printable character
`117`	`0x75`	`0165`	`u`	Printable character
`118`	`0x76`	`0166`	`v`	Printable character
`119`	`0x77`	`0167`	`w`	Printable character
`120`	`0x78`	`0170`	`x`	Printable character
`121`	`0x79`	`0171`	`y`	Printable character
`122`	`0x7A`	`0172`	`z`	Printable character
`123`	`0x7B`	`0173`	`{`	Printable character
`124`	`0x7C`	`0174`	`\|`	Printable character
`125`	`0x7D`	`0175`	`}`	Printable character
`126`	`0x7E`	`0176`	`~`	Printable character
`127`	`0x7F`	`0177`	`DEL`	Delete

The ASCII Character Set

ASCII (American Standard Code for Information Interchange) maps the numbers 0–127 to characters. It covers control codes, digits, punctuation, and the uppercase and lowercase English alphabet, and it forms the foundation of modern text encodings like UTF-8.

How the table is split

0–31 and 127 are non-printing control codes
32 is the space character
48–57 are the digits 0–9
65–90 are uppercase A–Z
97–122 are lowercase a–z

Handy relationships

Lowercase and uppercase letters are exactly 32 apart (A is 65, a is 97), which is why flipping a single bit converts between cases. The digits start at 48, so subtracting 48 from a digit's code gives its numeric value.

ASCII and Unicode

The first 128 Unicode code points are identical to ASCII, and UTF-8 encodes them in a single byte. This backward compatibility is why ASCII text is valid UTF-8 and why these codes still matter when working with strings, escape sequences, and low-level data.

Frequently Asked Questions

Common questions about the ASCII Table.

What does the ASCII table cover?

It maps the numbers 0 to 127 to characters, including control codes, digits, punctuation, and the English alphabet in both cases.

Why are codes 0-31 special?

Codes 0-31 and 127 are non-printing control characters such as TAB, LF, and CR, used to control devices and formatting rather than display text.

How are ASCII and Unicode related?

The first 128 Unicode code points are identical to ASCII, which is why ASCII text is also valid UTF-8.

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