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Popular tools

Word counter Date calculator Color converter Random number generator Random password generator JSON formatter Timestamp converter Base64 encoder/decoder

Encoding

Base64 encoder/decoderUse base64 encoder/decoder in your browser to process data locally.

URL encoder/decoderUse url encoder/decoder in your browser to process data locally.

HTML entity encoder/decoderUse html entity encoder/decoder in your browser to process data locally.

Unicode escape converterUse unicode escape converter in your browser to process data locally.

Hex encoder/decoderUse hex encoder/decoder in your browser to process data locally.

Base32 encoder/decoderUse base32 encoder/decoder in your browser to process data locally.

Base58 encoder/decoderUse base58 encoder/decoder in your browser to process data locally.

Base62 encoder/decoderUse base62 encoder/decoder in your browser to process data locally.

ASCII tableUse ascii table in your browser to process data locally.

Number-base converterUse number-base converter in your browser to process data locally.

Roman numeral converterUse roman numeral converter in your browser to process data locally.

Morse code converterUse morse code converter in your browser to process data locally.

ROT13 & Caesar cipherUse rot13 & caesar cipher in your browser to process data locally.

Gzip compressorUse gzip compressor in your browser to process data locally.

Brotli compressorUse brotli compressor in your browser to process data locally.

ZIP archive toolUse zip archive tool in your browser to process data locally.

Tar archive toolUse tar archive tool in your browser to process data locally.

Bzip2 compressorUse bzip2 compressor in your browser to process data locally.

Zstandard compressorUse zstandard compressor in your browser to process data locally.

Character encoding converterUse character encoding converter in your browser to process data locally.

Data URI converterUse data uri converter in your browser to process data locally.

Punycode converterUse punycode converter in your browser to process data locally.

Crypto and hashing

MD5 hashCompute an MD5 digest for text locally in the browser

SHA-1 hashCompute a SHA-1 digest with the browser Web Crypto API

SHA-256 hashCompute a SHA-256 hash for text in the browser

SHA-512 hashCompute a SHA-512 digest with the browser Web Crypto API

SHA-3 hashCompute a FIPS 202 SHA-3 digest locally

RIPEMD-160 hashCompute a RIPEMD-160 digest locally in the browser

File hashCompute a SHA-1, SHA-256, or SHA-512 hash for a local file

CRC32 checksumCompute a CRC32 checksum to detect transfer or storage errors

Adler-32 checksumCompute an Adler-32 checksum for quick data-error detection

HMAC signerCreate an HMAC with SHA-1, SHA-256, SHA-384, or SHA-512

AES encrypt and decryptEncrypt or decrypt text locally with AES-GCM and PBKDF2

DES/3DES encrypt and decryptEncrypt or decrypt legacy data with DES or 3DES settings

RSA encrypt and decryptGenerate an RSA-OAEP key pair and encrypt short text locally

JWT decoderDecode JWT header, payload, and signature segments in the browser

PBKDF2 password hashCreate and verify salted PBKDF2-HMAC-SHA-256 password hashes

Random password generatorGenerate secure passwords from length and character rules

UUID generatorGenerate batches of standard UUID v4 identifiers

NanoID generatorGenerate configurable NanoIDs with secure random bytes

API key generatorGenerate configurable API keys with browser-safe randomness

TOTP code generatorGenerate RFC 6238 time-based one-time passwords from a Base32 secret

SSL certificate parserInspect X.509 subject, validity, serial, and fingerprints from PEM or DER

Formatters

JSON formatterUse json formatter in your browser to process data locally.

JSON minifierUse json minifier in your browser to process data locally.

JSON5 parserUse json5 parser in your browser to process data locally.

JSONC formatterUse jsonc formatter in your browser to process data locally.

YAML formatterUse yaml formatter in your browser to process data locally.

TOML parserUse toml parser in your browser to process data locally.

XML formatterUse xml formatter in your browser to process data locally.

SQL formatterUse sql formatter in your browser to process data locally.

HTML formatterUse html formatter in your browser to process data locally.

CSS beautifierUse css beautifier in your browser to process data locally.

JavaScript beautifierUse javascript beautifier in your browser to process data locally.

Code minifierUse code minifier in your browser to process data locally.

JSON to TypeScriptUse json to typescript in your browser to process data locally.

JSON Schema generatorUse json schema generator in your browser to process data locally.

JSONPath queryUse jsonpath query in your browser to process data locally.

JSON Lines toolUse json lines tool in your browser to process data locally.

Markdown previewUse markdown preview in your browser to process data locally.

HTML to MarkdownUse html to markdown in your browser to process data locally.

Time and date

Timestamp converterConvert between Unix timestamps and date-time values

Date calculatorMeasure date intervals or calculate dates before and after a reference date

Countdown timerRun a precise countdown that can be paused, reset, or cleared

Workday calculatorCount workdays while excluding weekends and selected holidays

Current Unix timestampShow live Unix seconds, milliseconds, UTC, and ISO time

Time zone converterConvert date-times between common IANA time zones with Intl

China public holidaysLook up national holiday and makeup-workday schedules for 2024–2026

Chinese lunar calendarConvert dates and zodiac years with Intl for 1900–2100

Chinese zodiac lookupFind the lunar-year zodiac sign for dates from 1900–2100

Date range checkerMeasure a date difference and check whether a date falls in a range

StopwatchTrack elapsed time with pause and lap support

Pomodoro timerRun focus, short-break, and long-break cycles with pause support

Cron expression parserParse numeric five-field Cron expressions and show upcoming runs

Cron expression generatorBuild clear numeric five-field Cron expressions from common schedules

Weekday and day-of-yearFind a date’s day number, weekday, and weekday index

Relative timeShow how far a local date-time is from now

ISO week lookupCalculate ISO week year, week number, and week date range

MetronomePlay an adjustable BPM beat locally with Web Audio

Text tools

Word counterCount characters, words, lines, and paragraphs, with and without whitespace

Case converterConvert text between common English casing styles

Whitespace cleanerRemove whitespace, trim lines, or collapse horizontal spacing

Line sorterSort lines lexically, numerically, or by length

Text diffCompare two texts line by line and highlight additions, removals, and matches

Line toolsTrim, deduplicate, reverse, or number lines in bulk

Find and replaceFind and replace text in bulk with plain text or regular expressions

URL slug generatorNormalize a title or text into a URL-friendly slug

Chinese pinyin converterConvert Chinese or mixed text to pinyin with tone marks, numbers, or no tones

Unicode transliteratorTransliterate supported Latin, Greek, and Cyrillic characters to basic Latin

Number formatterZero-pad numbers to a fixed width or format them with grouping separators

String reverserReverse text by characters, words, or lines

Duplicate line removerCollapse duplicate lines, remove empty lines, and preserve the chosen order

Regex testerSafely test a regular expression with matches, highlights, capture groups, and replacement preview

Regex replaceRewrite text in bulk with regular expressions and replacement placeholders

Lorem ipsum generatorGenerate English or Chinese placeholder paragraphs for prototypes and layout tests

Number extractorExtract numbers from text with optional decimals, signs, grouping, and deduplication

Email extractorExtract and normalize email addresses from messages, pages, or contact lists

URL extractorFind URLs in mixed text with deduplication, protocol completion, and flexible output formats

Chinese script converterConvert Chinese text between simplified, traditional, and regional variants with OpenCC

Full-width / half-width converterConvert letters, digits, and spaces between full-width and half-width forms

Chinese uppercase amountConvert non-negative decimal amounts to Chinese uppercase RMB wording

Text column alignerArrange lines into columns and align them by Unicode display width

Text shufflerUse secure random values to shuffle characters, words, or lines

HTML tag removerParse an HTML fragment and remove tags, scripts, and styles to produce plain text

Chinese character gridGenerate printable Chinese character grids with crosshair guides

Data conversion

CSV to JSONUse csv to json in your browser to process data locally.

JSON to CSVUse json to csv in your browser to process data locally.

CSV viewerUse csv viewer in your browser to process data locally.

TSV converterUse tsv converter in your browser to process data locally.

JSON to ExcelUse json to excel in your browser to process data locally.

Excel to JSONUse excel to json in your browser to process data locally.

JSON ↔ YAML converterUse json ↔ yaml converter in your browser to process data locally.

JSON ↔ XML converterUse json ↔ xml converter in your browser to process data locally.

JSON diffUse json diff in your browser to process data locally.

JSON mergeUse json merge in your browser to process data locally.

JSON flattenerUse json flattener in your browser to process data locally.

JSON tree viewerUse json tree viewer in your browser to process data locally.

JSON searchUse json search in your browser to process data locally.

CSV validatorUse csv validator in your browser to process data locally.

JSON Lines converterUse json lines converter in your browser to process data locally.

CSV to Markdown tableUse csv to markdown table in your browser to process data locally.

Images and graphics

Image compressorCompress images with Canvas while choosing format, quality, and transparency

Image format converterConvert images to PNG, JPEG, or WebP while preserving dimensions

Image to Base64Convert a local image to a Data URL or plain Base64

Base64 to imageDecode an image Data URL or Base64 into a preview and download

Image resizerResize an image to target dimensions while preserving aspect ratio

Image cropperCrop an image by pixel coordinates or aspect-ratio presets

Rotate and flip imageRotate or mirror an image on a Canvas with correct output dimensions

Image watermarkOverlay a text watermark and adjust its position, opacity, and size

Image collageArrange local images in a grid or horizontal layout

EXIF viewerRead common JPEG EXIF capture metadata and orientation locally

QR code readerRead a QR code from a local image with BarcodeDetector when supported

Barcode readerDetect common barcodes in a local image when the browser supports it

Image OCRRead text from a local image with the browser TextDetector when supported

Placeholder image generatorCreate downloadable SVG or PNG placeholders with custom size and text

3x3 image slicerSplit an image into nine PNG tiles for individual or bundled download

PNG to ICOBuild a real multi-size ICO container from a local PNG

SVG optimizerMinify SVG whitespace and remove scripts, event handlers, and unsafe external resources

SVG to PNGDecode a local SVG safely and export a PNG at a chosen size and background

QR codes & barcodes

QR code generatorEnter text or a URL, choose the error-correction level, scale, and quiet zone, and generate a QR code.

Wi-Fi QR codeEncode an SSID, authentication mode, password, and hidden-network flag using the common Wi-Fi QR format.

vCard QR codeGenerate a vCard 3.0 QR code with name, phone, email, organization, website, and address fields.

Text QR codeEncode Unicode plain text as a downloadable PNG or SVG QR code.

URL QR codeValidate an HTTP or HTTPS URL and generate a normalized QR payload.

Barcode generatorGenerate Code 128, Code 39, EAN-13, EAN-8, UPC-A, and ITF-14 barcodes.

Styled QR codeCustomize foreground, background, and dot style while generating a QR code with a safe contrast and quiet zone.

EMV QR parserParse EMV QR TLV fields and calculate and verify the CRC with CRC-16/CCITT-FALSE.

QR image decoderUpload a local image and use the browser's BarcodeDetector to read QR content, reporting unsupported and undecoded states explicitly.

Barcode to textUpload a local image and use BarcodeDetector to read barcode text, with format selection and text download.

Developer tools

IP address calculatorCalculate IP addresses, subnets, and usable host ranges

IPv6 converterConvert IPv6 addresses between compressed and expanded notation

User-Agent parserRead browser, operating-system, and device details from a User-Agent string

URL parserBreak a URL into its protocol, host, path, query, and other components

HTTP status lookupLook up the meaning and common use of an HTTP status code

JWT builderBuild JWT headers and payloads to inspect a token's structure

Markdown table builderGenerate a formatted Markdown table from rows and columns

ASCII artTurn short text into an ASCII-art style rendering

Unicode character lookupInspect a character's code point, name, and UTF representations

Emoji pickerSearch, select, and copy emoji

HTML entities tableBrowse HTML entity names, numeric references, and rendered symbols

Git cheatsheetBrowse essential Git commands grouped by practical tasks

Regular expression librarySearch and copy practical regular-expression patterns

Screen color pickerPick a color from the screen and inspect its HEX, RGB, and HSL values

Fake data generatorGenerate test data such as names, email addresses, and phone numbers

Environment variable converterConvert environment-variable text to and from formats such as JSON

Cron expression readerTranslate a Cron expression into a human-readable schedule

JSON viewerFormat JSON and inspect it as a collapsible structure

HTTP status code tableBrowse HTTP status codes with categories, descriptions, and common uses

Sitemap XML generatorGenerate a search-engine Sitemap XML document from a list of URLs

Color and palettes

Color converterConvert between HEX, RGB, and HSL color formats

Color pickerConvert colors between HEX, RGB, and HSL and copy the results

Contrast checkerCalculate foreground/background contrast and WCAG AA or AAA results

Color palette generatorGenerate repeatable analogous, complementary, triadic, or monochrome palettes

Gradient generatorPreview a linear or radial gradient and copy its CSS

Color blenderBlend two HEX colors by RGB channel ratio

Color shade generatorCreate a repeatable light-to-dark scale from an HSL base color

Random color generatorGenerate a secure random color with crypto.getRandomValues

Image palette extractorQuantize a local image and extract its most common opaque colors

CSS named color lookupLook up standard CSS named colors with HEX, RGB, and a preview

Tailwind color paletteBrowse the project’s fixed Tailwind CSS v4.3.3 color palette

LAB/LCH converterConvert between sRGB, CIELAB, and CIELCH locally

Color-vision simulatorPreview approximate color-vision deficiency transformations

CSS color namesSearch 148 standard CSS named colors and copy their values

Calculators

Scientific calculatorEvaluate expressions with trigonometric, exponential, logarithmic, and other functions

BMI calculatorCalculate BMI and a general range from height and weight

Percentage calculatorCalculate percentages, percentage changes, and ratios of a whole

Unit converterConvert between units for length, mass, temperature, and more

Temperature converterConvert temperatures between Celsius, Fahrenheit, Kelvin, and more

Area converterConvert area units such as square meters and square feet

Volume converterConvert volume units such as liters and cubic meters

Speed converterConvert speeds such as kilometers per hour, meters per second, and knots

Data unit converterConvert data sizes such as bits, bytes, KB, and MB

Pressure converterConvert pressure units such as pascals, bar, psi, and mmHg

Power converterConvert power units such as watts, kilowatts, and horsepower

Angle converterConvert angles between degrees, radians, gradians, and more

Fuel calculatorEstimate fuel economy, consumption, and cost from distance and fuel data

Mortgage calculatorEstimate monthly mortgage payments from principal, rate, and term

Loan calculatorEstimate payments, interest, and total cost from loan terms

Tip calculatorCalculate the tip and per-person total from a bill, rate, and party size

Age calculatorCalculate current age and elapsed days from a birth date

Compound interest calculatorProject compound growth from principal, rate, term, and contributions

Random number generatorGenerate random numbers within a chosen range and count

Dice rollerRoll one or more dice with a chosen number of sides

Lifestyle tools

Decision spinnerEnter options and choose one at random

Random pickerPick items from a list with or without replacement

Password strengthCheck password length and composition and show improvement tips

Screen rulerMeasure on-screen distances in pixels

Screen testCheck display rendering with solid colors, gradients, and patterns

Eye-care colorShow eye-care color tones for breaks and environment adjustments

World clockCheck the current time across selected cities and regions

Habit trackerTrack daily progress for personal habits

Todo clipboardCreate a copyable task list with checkable items

Typing testMeasure typing speed and accuracy by retyping a displayed passage

Reading timeEstimate reading time from text length and a chosen speed

Post character counterCount characters and check a post-length limit

Sound volume testCheck microphone or speaker input levels

Day countdownCount the days until or since a chosen date

Document tools

PDF to textExtract text from a PDF and display it as plain text

Text to PDFExport text as a print-ready PDF document

Word to HTMLConvert Word document content into reusable HTML

PDF mergeMerge multiple PDFs into one document in the selected order

PDF page countCheck a PDF's page count and basic file information

Markdown to PDFRender Markdown and export it as a PDF

Excel template generatorGenerate a basic Excel template for a selected use case

Document word countCount characters, words, lines, and other document metrics

EPUB readerRead an EPUB in the browser and navigate its chapters

Invoice generatorCreate a simple printable invoice from entered line items

Fun & miscellaneous

Rock paper scissorsPlay rock paper scissors against the computer and keep a running win, loss, and draw record.

Number to ChineseConvert Arabic numerals to Chinese number words, including negative numbers and decimals.

Regex quizPractice regular expressions through five built-in challenges that test matching and rejecting sample strings.

Color memory gameMatch eight pairs of color cards while tracking the moves and time needed to complete the game.

Image to ASCII artConvert an image to copyable ASCII art in the browser, with character-width and invert controls.

Audio trimmerDecode audio in the browser, trim it by start and end seconds, and export a WAV PCM file.

Idle timerListen for pointer, keyboard, wheel, and touch activity on the current page and measure the time since the last activity.

JSON to SQLConvert a JSON object or array of objects into SQL text with an INSERT statement.