Online Developer Tools
— Fast, Private, Free
In-Browser Developer Tools
Format, convert, and process text, code, images and PDFs
— entirely in your browser and with zero sign-up.
Why Choose WebUtils?
Lightning‑Fast
Instant results with 100% client‑side processing.
Privacy‑First
Your data stays on your device; nothing is uploaded to our servers.
Developer‑Friendly
Clean UI and intuitive flows help you work faster with fewer errors.
Multi-Window Workflow
Detach tools into separate windows to view input and output simultaneously on different screens with real-time sync.
Popular Developer Tools
Open the most useful browser-based tools for formatting, encoding, PDFs, authentication, and data conversion.
JSON Formatter and Validator Online | Format, Minify, Debug
Format, validate, minify, and inspect JSON with examples and local processing.
Base64 Encoder and Decoder Online | UTF-8 and URL-Safe Text
Encode or decode Base64 text with UTF-8 support for APIs, JSON, and debugging.
Hash Generator Online | MD5, SHA-256 and SHA-512 Checksums
Generate MD5, SHA-1, SHA-256, and SHA-512 digests for checksums and fingerprints.
URL Encoder and Decoder Online | Query String Percent Encoding
Encode and decode URL components, query strings, and UTF-8 percent-encoded text.
JWT Decoder Online | Decode Claims, Header and Expiration
Decode JWT headers and payload claims locally for auth and API debugging.
UUID v4 Generator Online | Bulk GUIDs with Web Crypto
Generate secure UUID v4 identifiers in bulk with case and hyphen options.
QR Code Generator Online | URL, Wi-Fi, vCard, PNG and SVG
Create QR codes for URLs, text, Wi-Fi, and contact data with downloadable output.
CSV to JSON and JSON to CSV Converter Online | Local Data Tool
Convert CSV to JSON or JSON to CSV for spreadsheets, APIs, and data cleanup.
PDF Merge Online | Combine PDF Files Locally with No Upload
Merge multiple PDF files locally with drag-and-drop ordering and no upload.
Image to PDF Converter Online | JPG, PNG and Screenshots to PDF
Convert JPG and PNG images into a PDF with page size, order, and rotation controls.
Popular Tools
Discover our most‑used developer tools
Base64 Encoder and Decoder Online | UTF-8 and URL-Safe Text
Encode or decode Base64 text with UTF-8 support and local-only processing.
QR Code Generator Online | URL, Wi-Fi, vCard, PNG and SVG
Generate static QR codes for URLs, Wi-Fi, contacts, and text as PNG or SVG.
Color Converter & Picker | HEX, RGB, HSL, HSV, CMYK
Convert colors between HEX, RGB, HSL, HSV, and CMYK with a live picker and copy-ready values.
Get Started Free
No install or sign-up. Everything runs locally in your browser for speed and privacy.
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