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229 free tools. Everything runs in your browser.

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Formatters & Parsers

68 toolsSee the group page →
JSON ParserCheck if JSON is valid and see it neatly
JSON Schema ValidatorCheck data follows the rules you set
JSONPath TesterPick values out of JSON with a path
XML/XSD ValidatorCheck XML is valid and follows a schema
JSON ↔ TOML ConverterSwitch config files between JSON and TOML
URL ParserBreak a web link into its parts
Query String ParserRead the ?a=1&b=2 part of a link
REST API TesterSend API requests and see the response
JSON BeautifierMake messy JSON tidy and readable
JSON CompareSee what changed between two JSON files
Text CompareSpot the differences between two texts
XML FormatterMake XML tidy and readable
SQL FormatterMake database queries easy to read
GraphQL Query FormatterTidy up GraphQL queries
JSON ↔ YAML ConverterSwitch between JSON and YAML
cURL to Code ConverterTurn a curl command into ready code
Code Diff CheckerCompare two pieces of code side by side
Byte ParserRead raw bytes as text and numbers
JSON to TypeScriptCreate TypeScript types from sample data
JSON to Go StructCreate Go structs from sample data
JSON to Rust StructCreate Rust structs from sample data
JSON to C# ClassCreate C# classes from sample data
JSON to Java POJOCreate Java classes from sample data
JSON to Python DataclassCreate Python classes from sample data
JSON to Dart ClassCreate Dart / Flutter models from data
JSON to PHP ClassCreate PHP classes from sample data
JSON to C++ StructCreate C++ structs from sample data
JSON to Kotlin Data ClassCreate Kotlin data classes from data
JSON to Swift ModelCreate Swift models from sample data
JSON to Zod SchemaCreate Zod validation from sample data
JSON to JSON SchemaCreate a JSON Schema from sample data
JSON to Java Entity (JPA)Create Java database entities from data
jq PlaygroundFilter and reshape JSON with queries
JSON VisualizerSee JSON as a diagram you can explore
JSON EditorEdit JSON as text, tree or table
JavaScript MinifierMake JavaScript files smaller
JavaScript BeautifierMake JavaScript readable again
CSS MinifierMake CSS files smaller
CSS BeautifierMake CSS readable again
HTML MinifierMake HTML pages smaller
HTML BeautifierMake HTML readable again
Markdown Editor & PreviewWrite formatted notes with live preview
CSV ViewerOpen big CSV files as a table
JSON to CSVTurn JSON into a spreadsheet file
CSV to JSONTurn a spreadsheet file into JSON
JSON to ExcelOpen JSON data in Excel
Excel to JSONTurn an Excel sheet into JSON
JSON to HTML TableShow JSON data as a web table
CSV to XMLTurn spreadsheet rows into XML
CSV to YAMLTurn spreadsheet rows into YAML
CSV to Markdown TableTurn a spreadsheet into a Markdown table
CSV to SQL InsertTurn spreadsheet rows into SQL inserts
JSON to SQL Table (DDL)Create a database table from JSON
SQL Rows to JSONTurn query results into JSON
XML to JSONTurn XML into JSON
XML to YAMLTurn XML into YAML
XML to CSVTurn XML into a spreadsheet file
YAML to CSVTurn YAML into a spreadsheet file
TOML to CSVTurn TOML into a spreadsheet file
Properties to YAMLConvert Java settings files to YAML
Properties to JSONConvert Java settings files to JSON
YAML to PropertiesConvert YAML to Java settings files
HTML to JSXTurn HTML into React code
HTML to MarkdownTurn web page code into Markdown
Markdown to HTMLTurn Markdown into web page code
Markdown to JSXTurn Markdown into React code
GraphQL Schema to TypeScriptCreate TypeScript types from GraphQL
Zod to TypeScriptTurn Zod schemas into TypeScript types

Security & Auth

31 toolsSee the group page →
JWT DecoderSee what is inside a login token
Encode / DecodeTurn text into safe codes, and back
Hash GeneratorCreate a fingerprint of text or a file
Password GeneratorCreate strong passwords you can trust
Password Strength CheckerSee how strong your password really is
Certificate DecoderRead what is inside an SSL certificate
IBAN ValidatorCheck a bank account number (IBAN)
CSP Header GeneratorBuild a security header for your website
AES-256 Encrypt & DecryptLock and unlock text with a password
Base64URL & Base32 ConverterEncode text for links and codes
RSA Key Pair GeneratorCreate a public / private key pair
JWT Encoder / SignerCreate and sign login tokens for testing
Bcrypt HasherHash passwords safely with bcrypt
Argon2id GeneratorHash passwords with Argon2
Scrypt GeneratorCreate keys from passwords with scrypt
PBKDF2 GeneratorCreate keys from passwords with PBKDF2
HMAC SignerSign messages and check webhooks
CSR DecoderRead a certificate request before you buy
PKCS#12 / PFX ViewerSee what is inside a .pfx certificate file
Private Key InspectorCheck what kind of key you have
Caesar CipherShift letters to make a secret message
Vigenère CipherClassic keyword cipher, step by step
ROT13 / ROT47Hide spoilers by rotating letters
Atbash CipherReverse the alphabet to code a message
Affine CipherMaths-based classic cipher
Rail Fence CipherZig-zag cipher, shown step by step
Morse Code TranslatorTurn text into Morse code and sound
Basic Auth Header GeneratorCreate a login header for API tests
Defang / Refang URLMake links safe to share in reports
Entropy CalculatorMeasure how random text or a file is
PGP Key GeneratorCreate keys to encrypt and sign email

Code & Conversion

40 toolsSee the group page →
Unix Timestamp ConverterTurn computer time into a real date
Timezone ConverterFind the time in other cities
Number / Byte FormatterTurn bytes into KB, MB and GB
Cron ParserUnderstand a cron schedule in plain English
Base ConverterConvert binary, decimal and hex numbers
Case ConverterChange text to UPPER, lower, Title case
Slug GeneratorMake clean web addresses from titles
Subnet CIDR CalculatorWork out IP ranges for networks
HTML Entity Encoder/DecoderShow special characters safely in HTML
Regex TesterTest search patterns and see what matches
JSON String Escape / UnescapeMake text safe to put inside JSON
Unicode Character InspectorSee the code behind any character or emoji
Text to Binary / ASCIITurn text into 0s and 1s
HTML to Plain TextStrip web page code, keep the words
Emoji & Unicode EscapeWrite emoji safely in code
Gzip CompressorSqueeze text or files smaller with gzip
Zlib Deflate / InflateCompress and decompress with zlib
Brotli SandboxSee how much Brotli shrinks your files
Base85 / Ascii85Encode data with Base85
Base58 Encoder / DecoderEncode data the Bitcoin way (Base58)
Punycode ConverterUse domain names in any language
URL Double EncodingFix links that were encoded twice
Bencode Decoder / EncoderRead .torrent and bencoded data
MessagePack VisualizerRead MessagePack data
Protobuf DecoderRead Protocol Buffers messages
CBOR DecoderRead CBOR data
ASN.1 DecoderExplore certificate and key structures
Binary to DecimalConvert binary to normal numbers
Decimal to BinaryConvert numbers to binary
Decimal to HexConvert numbers to hex
RGB to HexTurn an RGB colour into hex
Epoch to DateTurn a timestamp into a date
Base64 to ImageTurn Base64 text back into an image
Hex to DecimalConvert hex to normal numbers
Hex to RGBTurn a hex colour into RGB
Roman Numeral ConverterConvert numbers to Roman numerals
NATO Phonetic AlphabetSpell words clearly on the phone
Text Encoding FixerFix garbled characters like é
File Type CheckerFind out what a file really is
Hex DumpLook inside any file byte by byte

Frontend & Design

35 toolsSee the group page →
User-Agent ParserSee which browser and device a visitor uses
SVG OptimizerMake SVG images smaller
Color ConverterConvert colours between HEX, RGB and HSL
Color Blindness SimulatorSee how colour-blind people see your design
CSS Effects GeneratorCreate gradients and shadows visually
Meta Tag / Open Graph PreviewPreview how your page looks on Google and social
Image Resizer / CropperResize photos, including passport size
Base64 Image ConverterTurn an image into text code, and back
Favicon GeneratorCreate a website icon in every size
px to rem ConverterConvert pixel sizes to rem
CSS clamp() GeneratorMake text that scales with the screen
Aspect Ratio CalculatorWork out width and height for any ratio
Color Palette GeneratorCreate a matching colour palette
CSS Grid GeneratorDesign page layouts visually
Flexbox PlaygroundTry layout settings and copy the CSS
Image to WebPMake images smaller for the web (WebP)
Image CompressorMake photos smaller for email or forms
EXIF Viewer & RemoverSee and remove hidden photo data (like GPS)
SVG to PNGTurn SVG graphics into PNG images
Placeholder Image GeneratorCreate placeholder images for mockups
Border Radius GeneratorDesign rounded corners visually
React Native Shadow GeneratorDesign shadows for mobile apps
CSS to React NativeTurn web styles into mobile app styles
Code to ImageTurn code into a nice image to share
Schema Markup GeneratorHelp Google show rich results for your page
JavaScript Keycode InfoPress a key, see its code
Cubic Bezier GeneratorDesign smooth animation timing
CSS Clip Path GeneratorCut shapes out of images with CSS
Glassmorphism GeneratorCreate frosted-glass panels
CSS Loader GeneratorCreate loading spinners
CSS Triangle GeneratorMake CSS triangles and arrows
CSS Background Pattern GeneratorCreate background patterns with CSS
Image Color ExtractorGet the main colours from a picture
Image CropperCrop and rotate photos
My Device InfoSee your browser, screen and device details

Data Generation & Utilities

22 toolsSee the group page →
GUID GeneratorCreate unique IDs
Dummy Data GeneratorCreate realistic sample data for tests
String Replacer / List CompareFind and replace text, or compare lists
Lorem Ipsum GeneratorPlaceholder text for designs
Robots.txt GeneratorControl which pages search engines read
QR Code GeneratorMake a QR code for links, Wi-Fi or UPI
Word & Character CounterCount words, characters and reading time
Random String GeneratorCreate random codes and tokens
Barcode GeneratorMake product barcodes
QR Code ScannerRead a QR code from a picture
ASCII Art Text GeneratorTurn text into big ASCII letters
Text ExtractorPull emails or links out of any text
Date Difference CalculatorCount days between two dates
Date Add / SubtractAdd or subtract days from a date
Date Format ConverterChange how a date is written
Week Number CalculatorFind the week number of any date
JSON Key SorterSort JSON keys A to Z
JSON Flatten / UnflattenTurn nested JSON into flat keys and back
Fake CSV GeneratorCreate sample spreadsheets for testing
Number to WordsWrite numbers in words (₹ lakh, crore)
Line ToolsRemove duplicates, sort and clean lists
WhatsApp Link GeneratorCreate a WhatsApp chat link and QR

DevOps & Network

28 toolsSee the group page →
Docker Compose BuilderBuild a Docker setup by picking services
Dockerfile LinterFind problems in a Dockerfile
Kubernetes YAML ValidatorCheck Kubernetes files before deploying
.env Parser & ValidatorCheck .env settings files
.gitignore GeneratorCreate a .gitignore for your project
Nginx Config GeneratorCreate a web server config
.htaccess GeneratorCreate redirects and HTTPS rules
chmod CalculatorWork out file permission numbers
Crontab GeneratorBuild a schedule by picking times
SSH Key GeneratorCreate SSH keys for servers and Git
Semver CalculatorCheck version ranges like ^1.2.0
HTTP Status CodesWhat every website error code means
MIME Type LookupFind the right file type label
Port Number ReferenceCommon network ports and what uses them
GitHub Actions ValidatorCheck GitHub workflow files
Docker Run to ComposeTurn docker run commands into a file
IP Address ConverterConvert IP addresses between formats
MAC Address FormatterFormat device hardware addresses
DNS LookupSee where a website points (DNS records)
Email Address ValidatorCheck if an email address looks right
Phone Number FormatterCheck and format phone numbers
HTTP Header ParserCheck a site's security headers
Cookie ParserRead cookies and spot unsafe settings
Luhn / Test Card ValidatorCheck card numbers and get test cards
TOTP / 2FA Code GeneratorTest 2-step login codes
UTM Link BuilderCreate trackable links for campaigns
IPv6 ULA GeneratorCreate private IPv6 address ranges
MAC Address LookupFind who made a network device

PDF & Documents

5 toolsSee the group page →
Merge PDFCombine PDFs into one file
Split PDFSplit a PDF into parts
Organize PDFReorder, rotate or delete PDF pages
Images to PDFTurn photos into one PDF
Image to Text (OCR)Copy text out of a photo (OCR)