kr3 devtools

kr3.md

Kr3 DevTools

• Home: Browse the toolbox and jump into any tool.

Data Tools

• Batch JSON Formatter: Format or minify multiple JSON documents locally.
• CSS Formatter / Compressor: Format or compress CSS locally.
• CSV Table to SQL: Convert a CSV table into SQL INSERT statements locally.
• HTML Formatter: Format HTML markup locally.
• HTML Symbols Reference: Reference common HTML entities locally.
• HTML Table to Markdown Table: Convert HTML tables into Markdown tables locally.
• HTML to JSX: Convert common HTML attributes into JSX syntax locally.
• HTML to SQL: Convert an HTML table into SQL INSERT statements locally.
• JavaScript Formatter / Compressor: Format or compress JavaScript locally.
• JSON Formatter: Format, validate, and inspect JSON input as a readable tree in the browser.
• JSON Minifier: Minify and validate JSON input in the browser.
• JSON to Crystal Class: Infer a Crystal JSON::Serializable class from JSON locally.
• JSON to CSV: Convert JSON into CSV locally.
• JSON to HTML: Convert JSON into an HTML table locally.
• JSON to IO-TS: Infer an io-ts codec from JSON locally.
• JSON to Pike Class: Infer a Pike class from JSON locally.
• JSON to Sarcastic: Convert JSON into sarcastic TypeScript-like output.
• JSON to SQL: Generate SQL INSERT statements from JSON locally.
• JSON to SQL Schema: Infer a SQL table schema from JSON locally.
• JSON to Swift Struct: Infer a Swift Codable struct from JSON locally.
• JSON to TSV: Convert JSON into TSV locally.
• JSON to TypeScript Interface: Infer a TypeScript interface from JSON locally.
• JSON to YAML: Convert JSON into YAML locally.
• Less to CSS: Compile a small local subset of Less into CSS.
• Markdown Table to HTML Table: Convert Markdown tables into HTML tables locally.
• SQL Compressor: Minify SQL statements locally.
• SQL Formatter: Format SQL statements locally.
• SQL Schema to C# Class: Generate a C# class from SQL schema locally.
• SQL Schema to Python Class: Generate a Python dataclass from SQL schema locally.
• SQL Schema to TypeScript Interface: Generate a TypeScript interface from SQL schema locally.
• SQL Unescape: Unescape SQL string literals locally.
• YAML Formatter / Compressor: Format or compact YAML locally.
• YAML to JSON: Convert YAML into formatted JSON locally.

Encoding Tools

• Base64 Codec: Encode and decode Base64 strings with UTF-8 support.
• Base64 File Decode: Decode Base64 into a downloadable file locally.
• Base64 File Encode: Encode a local file to Base64 without uploading it.
• Base64 to Hex: Convert Base64 text into hexadecimal bytes locally.
• CIDR Calculator: Calculate CIDR network details locally.
• JSON Escape / UnEscape: Escape and unescape JSON string content locally.
• JWT Decoder: Decode, inspect, and verify JWTs locally.
• Morse Decode: Decode Morse code into text locally.
• Morse Encode: Encode text into Morse code locally.
• Port Cheat Sheet: Reference common network ports locally.
• String Escape: Escape and unescape string literals locally.
• URL Codec: Encode and decode URL components or full URI strings.
• URL Parse: Parse URL parts and query parameters locally.
• UTF Encoding Inspector: Inspect UTF-8 and UTF-16 hex encodings locally.
• UTF16 Decode: Decode UTF-16LE hex bytes locally.
• UTF7 Encode: Encode and decode UTF-7 or IMAP UTF-7 locally.
• UTF8 Decode: Decode UTF-8 hex bytes locally.
• WebSocket Tester: Connect to a WebSocket endpoint locally from the browser.

Crypto Tools

• AES Decryption: Decrypt AES text locally.
• AES Encryption: Encrypt text with AES locally.
• BCrypt Verify: Verify a password against a bcrypt hash.
• CRC1 Hash: Generate a CRC1 checksum locally.
• CRC16-CCITT Hash: Generate a CRC16-CCITT checksum locally.
• CRC24 Hash: Generate a CRC24 checksum locally.
• CRC32 Hash: Generate a CRC32 checksum locally.
• DES Decryption: Decrypt DES text locally.
• DES Encryption: Encrypt text with DES locally.
• Hash Generator: Generate SHA digests for text input using the browser crypto API.
• Htpasswd Generator: Generate htpasswd entries locally.
• JWT Encoder: Generate and sign JWTs locally.
• Keccak224 Hash: Generate a Keccak224 hash locally.
• PGP Decrypt: Decrypt PGP armored text locally.
• PGP Encrypt: Encrypt text with a PGP public key locally.
• PGP Key Pair Generator: Generate PGP key pairs locally.
• PGP Sign: Create a cleartext PGP signature locally.
• PGP Verify: Verify a cleartext PGP signature locally.
• Rabbit Decryption: Decrypt text with Rabbit locally.
• Rabbit Encryption: Encrypt text with Rabbit locally.
• RC4 Decryption: Decrypt RC4 text locally.
• RC4 Encryption: Encrypt text with RC4 locally.
• RSA Decryption: Decrypt RSA ciphertext locally.
• RSA Encryption: Encrypt text with an RSA public key locally.
• RSA Key Pair Generator: Generate RSA key pairs locally.
• RSA Private to Public: Extract a public RSA key from a private key locally.
• SHA3-512 Hash: Generate a SHA3-512 hash locally.
• SM2 Decryption: Decrypt SM2 ciphertext locally.
• SM2 Encryption: Encrypt text with SM2 locally.
• SM4 Decryption: Decrypt SM4 ciphertext locally.
• SM4 Encryption: Encrypt text with SM4 locally.
• Triple DES Decryption: Decrypt Triple DES text locally.
• Triple DES Encryption: Encrypt text with Triple DES locally.

Time Tools

• Countdown: Count down to a target time locally.
• Crontab: Describe five-field cron expressions locally.
• Timestamp Converter: Convert timestamps or date strings into readable date values.

Text Tools

• Arabic to Roman: Convert Arabic numerals into Roman numerals locally.
• Barcode Generator: Generate a barcode image locally.
• Barcode Scanner: Scan a barcode from an image or camera.
• Chinese to Pinyin: Convert Chinese text to pinyin locally.
• English Pluralize: Pluralize English words locally.
• Mermaid Editor: Edit and preview Mermaid diagrams locally.
• QR Code for Email: Generate a QR code for email content.
• QR Code for Ethereum Address: Generate a QR code for an Ethereum address.
• QR Code for Phone Number: Generate a QR code for a phone number.
• QR Code for SMS: Generate a QR code for an SMS payload.
• QR Code for Text: Generate a QR code from plain text.
• QR Code for URL: Generate a QR code from a URL.
• QR Code Scanner: Scan a QR code from an image or camera.
• Simplified to Traditional Chinese: Convert between simplified and traditional Chinese locally.
• Text Case Converter: Convert text into camelCase, snake_case, kebab-case, title case, or constant case.

Image Tools

• Batch Image Crop: Batch crop photos to a target size with cover crop or centered padding.
• Code to Image: Render code into a shareable SVG image locally.
• Color Extraction: Extract a simple dominant palette from an image locally.
• Image Compressor: Compress images locally with Squoosh-style quality and resize controls.
• Image Crop: Crop local images with free selection or common photo presets.
• Image to Icon: Convert an image into icon-sized PNG and ICO files locally.

Generator Tools

• Chmod Calculator: Convert between chmod octal and symbolic modes locally.
• Color Picker: Pick and convert colors locally.
• CSS Grid Generator: Generate CSS Grid snippets locally.
• Loan Calculator: Calculate loan payment and interest locally.
• Lottery: Randomly pick items from a list locally.
• Regex Tester: Test regular expressions locally.
• UUID / ULID Generator: Generate UUID v4 and ULID values locally.
• UUID Generator: Generate RFC 4122 version 4 UUID values locally.
• UUID Parser: Parse UUID version and variant information locally.