86 FREE TOOLS / 3 SUBCATEGORIES
Developer & QR Tools
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HTML Escape Tool
HTML Escape Tool with an instant result. Escape ampersands, brackets and quotes as HTML entities.
Developer ToolsHTML Decoder
HTML Decoder with an instant result. Decode common HTML entities and decimal/hex numeric entities; output remains plain text.
Developer ToolsURL Encoder
URL Encoder with an instant result. Percent-encode a URL component, including spaces and reserved characters.
Developer ToolsURL Decoder
URL Decoder with an instant result. Decode percent escapes; plus signs are treated as spaces (form encoding).
Developer ToolsBase64 Encoder
Base64 Encoder with an instant result. Encode UTF-8 text as standard Base64.
Developer ToolsBase64 Decoder
Base64 Decoder with an instant result. Decode standard Base64 as UTF-8; rejects invalid UTF-8 data.
Developer ToolsText to ASCII
Text to ASCII with an instant result. Convert ASCII characters (0–127) to decimal character codes.
Developer ToolsASCII to Text
ASCII to Text with an instant result. Convert decimal ASCII codes (0–127) into text.
Developer ToolsUnicode Converter
Unicode Converter with an instant result. Show each Unicode code point in U+ notation.
Developer ToolsFile Name Cleaner
File Name Cleaner with an instant result. Replace characters disallowed in Windows filenames. Check reserved device names before saving.
Developer ToolsBinary to Decimal
Binary to Decimal with an instant result. Convert whole numbers using base 2. Supports arbitrarily large integers.
Developer ToolsDecimal to Binary
Decimal to Binary with an instant result. Convert whole numbers using base 2. Supports arbitrarily large integers.
Developer ToolsHex to Decimal
Hex to Decimal with an instant result. Convert whole numbers using base 16. Supports arbitrarily large integers.
Developer ToolsDecimal to Hex
Decimal to Hex with an instant result. Convert whole numbers using base 16. Supports arbitrarily large integers.
Developer ToolsOctal to Decimal
Octal to Decimal with an instant result. Convert whole numbers using base 8. Supports arbitrarily large integers.
Developer ToolsDecimal to Octal
Decimal to Octal with an instant result. Convert whole numbers using base 8. Supports arbitrarily large integers.
Developer ToolsJSON Formatter
JSON Formatter with an instant result. Parse JSON with strict JSON syntax. Invalid input displays an error.
Developer ToolsJSON Minifier
JSON Minifier with an instant result. Parse JSON with strict JSON syntax. Invalid input displays an error.
Developer ToolsJSON Validator
JSON Validator with an instant result. Parse JSON with strict JSON syntax. Invalid input displays an error.
Developer ToolsJSON to CSV
JSON to CSV with an instant result. Convert an array of flat JSON objects to quoted CSV. Nested values are serialized as JSON.
Developer ToolsCSV to JSON
CSV to JSON with an instant result. Use the first row as unique column headings; cell values remain strings. Handles quoted commas and line breaks.
Developer ToolsCSV Formatter
CSV Formatter with an instant result. Parse and re-emit CSV with quoted cells and consistent line breaks.
Developer ToolsJWT Decoder
JWT Decoder with an instant result. Decode the header and payload of a JWT. This does not verify its signature or trustworthiness.
Developer ToolsQuery String Parser
Query String Parser with an instant result. Parse URL query parameters and preserve repeated keys as arrays.
Developer ToolsURL Parser
URL Parser with an instant result. Inspect protocol, host, port, pathname, query and fragment without making a network request.
Developer ToolsDomain Extractor
Domain Extractor with an instant result. Extract the hostname from an HTTP(S) URL. Does not perform a WHOIS or availability lookup.
Developer ToolsURL Cleaner
URL Cleaner with an instant result. Remove common tracking parameters (utm_*, fbclid, gclid, msclkid) while preserving other parameters.
Developer ToolsRandom Number Generator
Random Number Generator with an instant result. Uniform integers, inclusive bounds; repeats allowed. Uses cryptographic randomness.
Random & SecurityUUID Generator
UUID Generator with an instant result. Generate RFC 4122 version 4 identifiers using cryptographic randomness.
Random & SecurityRandom Token Generator
Random Token Generator with an instant result. Generate random bytes as hexadecimal. Each byte becomes two hex characters.
Random & SecurityPassword Generator
Password Generator with an instant result. Generate a password with uppercase, lowercase and digits, plus symbols when selected. Uses unbiased Web Crypto choices.
Random & SecurityDice Roller
Dice Roller with an instant result. Roll independent fair dice with cryptographic randomness.
Random & SecurityCoin Flip
Coin Flip with an instant result. Generate independent heads/tails outcomes with equal probability.
Random & SecurityRandom Yes/No
Random Yes/No with an instant result. Generate independent yes/no outcomes with equal probability.
Random & SecurityRandom Name Picker
Random Name Picker with an instant result. Select unique line-separated entries without replacement. Duplicate names count once.
Random & SecurityRandom Team Generator
Random Team Generator with an instant result. Shuffle people into balanced teams; every listed entry appears once.
Random & SecurityRandom Date
Random Date with an instant result. Choose calendar dates uniformly, including both endpoints.
Random & SecuritySHA256 Generator
SHA256 Generator with an instant result. Hash UTF-8 text using SHA-256. A digest is not encryption or password storage.
Random & SecuritySHA384 Generator
SHA384 Generator with an instant result. Hash UTF-8 text using SHA-384. A digest is not encryption or password storage.
Random & SecuritySHA512 Generator
SHA512 Generator with an instant result. Hash UTF-8 text using SHA-512. A digest is not encryption or password storage.
Random & SecuritySHA1 Generator
SHA1 Generator with an instant result. Hash UTF-8 text using SHA-1. Legacy checksums only; SHA-1 is not suitable for security.
Random & SecurityFile Hash Generator
Hash a local file with Web Crypto; files stay on your device.
Random & SecurityFile Extension Finder
Inspect the file name, extension, byte size and browser-reported MIME type. MIME type is advisory.
Developer ToolsURL QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesText QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesWi-Fi QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesPhone QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesEmail QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesWhatsApp QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesSMS QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesLocation QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesContact/VCard QR
Generate and download a QR code locally. Test it with your intended scanner before sharing.
QR & BarcodesBarcode Generator
Download an SVG barcode. EAN/UPC require a valid check digit. Generating a symbol does not assign an official product identifier.
QR & BarcodesEAN Generator
Download an SVG barcode. EAN/UPC require a valid check digit. Generating a symbol does not assign an official product identifier.
QR & BarcodesUPC Generator
Download an SVG barcode. EAN/UPC require a valid check digit. Generating a symbol does not assign an official product identifier.
QR & BarcodesISBN Barcode Generator
Download an SVG barcode. EAN/UPC require a valid check digit. Generating a symbol does not assign an official product identifier.
QR & BarcodesConventional Commit Generator
Conventional Commit Generator with an instant result. Create a conventional commit subject from a type, optional scope and summary.
Developer ToolsGit Branch Name Generator
Git Branch Name Generator with an instant result. Create a branch path from a prefix and an ASCII slug.
Developer ToolsSemantic Version Calculator
Semantic Version Calculator with an instant result. Increment a stable major.minor.patch version and reset the lower components.
Developer ToolsFetch Request Generator
Fetch Request Generator with an instant result. Generate an HTTP request snippet. It is not executed. Review the destination and credentials before using it.
Developer ToolsAxios Request Generator
Axios Request Generator with an instant result. Generate an HTTP request snippet. It is not executed. Review the destination and credentials before using it.
Developer ToolsPython Requests Request Generator
Python Requests Request Generator with an instant result. Generate an HTTP request snippet. It is not executed. Review the destination and credentials before using it.
Developer ToolsCURL Command Generator
CURL Command Generator with an instant result. Generate an HTTP request snippet. It is not executed. Review the destination and credentials before using it.
Developer ToolsEnvironment Variable Formatter
Environment Variable Formatter with an instant result. Normalize environment variable keys and quote values as JSON strings. Never paste production secrets into shared output.
Developer ToolsSQL SELECT Generator
SQL SELECT Generator with an instant result. Generate a PostgreSQL SELECT query with quoted simple identifiers. This does not connect to or execute against a database.
Developer ToolsMongoDB ObjectId Validator
MongoDB ObjectId Validator with an instant result. Check whether a string consists of 24 hexadecimal digits. Does not query MongoDB.
Developer ToolsYAML to JSON
YAML to JSON with an instant result. Convert locally using a dedicated parser. Generated HTML is shown as code; preview HTML is sanitized and isolated.
Developer ToolsJSON to YAML
JSON to YAML with an instant result. Convert locally using a dedicated parser. Generated HTML is shown as code; preview HTML is sanitized and isolated.
Developer ToolsMarkdown to HTML
Markdown to HTML with an instant result. Convert locally using a dedicated parser. Generated HTML is shown as code; preview HTML is sanitized and isolated.
Developer ToolsMarkdown Preview
Markdown Preview with an instant result. Convert locally using a dedicated parser. Generated HTML is shown as code; preview HTML is sanitized and isolated.
Developer ToolsHTML Formatter
HTML Formatter with an instant result. Format source code locally with Prettier. Formatting does not execute or validate the safety of the code.
Developer ToolsCSS Formatter
CSS Formatter with an instant result. Format source code locally with Prettier. Formatting does not execute or validate the safety of the code.
Developer ToolsJavaScript Formatter
JavaScript Formatter with an instant result. Format source code locally with Prettier. Formatting does not execute or validate the safety of the code.
Developer ToolsRegex Tester
Regex Tester with an instant result. Test JavaScript regular expressions in an isolated worker with a one-second timeout to prevent runaway matching.
Developer ToolsPassword Strength Checker
Password Strength Checker with an instant result. Local heuristic based on length, character groups and a small set of obvious patterns. It does not query breaches, estimate cracking time or prove security; the password is not included in the result.
Random & SecurityText to Binary
Text to Binary with an instant result. Encode Unicode text as UTF-8 and show each byte as eight binary digits. Supports up to 65,536 bytes; unpaired surrogates are rejected to preserve round trips.
Developer ToolsBinary to Text
Binary to Text with an instant result. Decode complete binary bytes using strict UTF-8. Enter whitespace-separated 8-bit groups or one continuous bit string. Invalid UTF-8 is rejected rather than silently replaced.
Developer ToolsXML Formatter
Format well-formed XML locally while preserving mixed text and inline elements. DTDs and external entities are not supported.
Developer ToolsSQL Formatter
Indent SQL statements and standardize keyword casing with a dialect-aware formatter. No database connection is used.
Developer ToolsWhat Is My Browser
Inspect this browser’s reported user agent, languages, platform and supported local device facts without an external lookup.
Developer ToolsHTML Editor
Edit HTML and inline CSS locally with an isolated preview. JavaScript and network resources are disabled in the preview.
Developer ToolsHTML Minifier
Minify pasted HTML locally. Review and test the output before replacing production code.
Developer ToolsCSS Minifier
Minify pasted CSS locally. Review and test the output before replacing production code.
Developer ToolsJavaScript Minifier
Minify pasted JavaScript locally. Review and test the output before replacing production code.
Developer ToolsOpen All URLs
Validate up to 25 HTTP/HTTPS links and create a clickable list. Open each link yourself; your browser stays in control of new tabs.
Developer ToolsMD5 Generator
Compute an MD5 checksum of UTF-8 text locally. MD5 is a legacy checksum and is unsuitable for password storage or collision-resistant security.
Developer Tools