Dev Tools
(57)Free developer utilities that run entirely in your browser — format and validate JSON, encode Base64 and URLs, hash and diff text, generate UUIDs, and more. Nothing is uploaded.
JSON Formatter Format, minify, and validate JSON Base64 Encode / Decode Encode and decode Base64 text URL Encode / Decode Encode and decode URL components JWT Decoder Decode JWT header and payload (no verification) UUID Generator Generate random UUID v4 identifiers Password Generator Generate strong random passwords Text Diff Compare two texts line by line JSON Deep Compare Deep compare JSON objects ignoring property order API Client REST API client — import Postman, Insomnia, Swagger or HAR and fire requests in your browser. CSV ↔ JSON Convert between CSV and JSON (comma, semicolon, tab, pipe) JSON ↔ YAML Convert between JSON and YAML JSON ↔ XML Convert between JSON and XML JSON ↔ TOML Convert between JSON and TOML Ghost Blog Backup Convert a Ghost export to Markdown or HTML files (ZIP) Compare Two Lists Merge, dedupe, subtract or find common lines between two lists Sort Text Lines Sort lines A→Z, Z→A or reversed — by key, case-insensitive, natural order SQL Formatter Format and beautify SQL queries (PostgreSQL, MySQL, and more) Regex Tester Test regular expressions with live highlighting and per-language code QRIS Decoder Decode a QRIS payment code — merchant, NMID, city, amount Hash Text MD5, SHA-1/256/512 and CRC32 hashes of any text Text Encryption Encrypt/decrypt a message with a password (AES-256) CIDR Calculator IPv4 subnet calculator — network, broadcast, mask, host range HTML/CSS/JS Minifier Minify HTML, CSS and JavaScript in your browser Code Beautifier Format JS, TS, CSS, HTML, JSON, Markdown & YAML with Prettier vCard ↔ CSV Convert contacts between vCard (.vcf) and CSV NPWP Validator Validate and format an Indonesian NPWP (tax ID) NIK / KTP Decoder Validate an Indonesian NIK and decode province, birth date & gender Terbilang (Number to Words) Convert numbers to Indonesian words for invoices & cheques PPN & PPh Calculator Calculate Indonesian PPN (VAT) and PPh withholding on invoices Word Counter Count words, characters, sentences & reading time Case Converter Convert text between UPPER, lower, Title, camel, snake & kebab case Text Cleanup Clean up text — trim, strip HTML, remove line breaks, dedupe & sort Slugify Turn any text or title into a clean, URL-safe slug HTTP Status Codes Look up any HTTP status code — number, class or name MIME Type Lookup Find the MIME type for a file extension (and vice versa) Lorem Ipsum Generator Generate placeholder Lorem Ipsum by paragraph, sentence or word Fancy Text Generator Turn text into fancy Unicode styles for bios and posts Image to Base64 Convert an image to a Base64 data URI for CSS/HTML CSS Generator Generate gradient, box-shadow & border-radius CSS with a preview HTML ↔ Markdown Convert between HTML and Markdown, both ways What Is My Browser See your user agent, browser, screen & viewport size and more Emoji & Symbol Picker Search and copy emoji & special characters (—, °, ±, €, ⌘) Cron Expression Parse and explain cron expressions with next scheduled run times Clipboard Inspector Inspect and save clipboard contents — text, images, video, audio, and files Markdown Preview Live Markdown editor and preview QR Code Generator Generate a QR code from text or a URL QR Code Reader Decode a QR code from an image Barcode Scanner Scan & decode barcodes and QR codes from camera or image Barcode Generator Generate Code 128, EAN, UPC and other barcodes as PNG/SVG Timestamp Converter Convert between Unix time and dates Number Base Converter Convert numbers between binary, octal, decimal, and hex Color Converter / Picker Pick or Convert colors between HEX, RGB, and HSL WCAG Contrast Checker Check text/background colour contrast against WCAG AA & AAA Braille Converter Convert text to Grade 1 Unicode braille URL Tracking Stripper Remove utm_, fbclid, gclid and other tracking parameters from links Invoice Generator Create a printable invoice with tax (PPN) and save as PDF Hash File Generate a SHA-256 hash of a file
Frequently asked questions
Are my inputs uploaded to a server?
No. Every Dev tool on PDFPowerHub runs in your browser — formatting JSON, encoding Base64, hashing text and generating UUIDs all happen on your device, so your inputs never leave it.
Do I need to install anything or create an account?
No install and no sign-up. Open the page and use any tool instantly — no limits and no watermarks.
Do these Dev tools work offline?
Yes. PDFPowerHub is a PWA, so once loaded the tools keep working with no internet connection.
Are these Dev tools free?
Yes — every tool in the Dev category is completely free, with no limits or watermarks.