Free & Privacy-First
Developer & Security Tools
A curated suite of free utilities for developers and security professionals. All processing happens in your browser — nothing leaves your machine.
No data collection
Client-side only
Always free
AllSecurityDeveloperUtilities
SAML Validator
Decode and validate SAML assertions. Inspect Issuer, NameID, Audience, Conditions, and signature presence.
SecurityOIDC / OAuth2 Debugger
Decode JWT ID Tokens, inspect claims, and validate token expiry for OpenID Connect flows.
SecurityJWT Decoder & Inspector
Paste any JWT to inspect its header, payload, and signature. Pretty-printed with expiry checks.
SecurityEncryptor / Decryptor Toolkit
AES encrypt/decrypt with passwords, plus Base64, URL, and Hex encode/decode utilities.
SecurityHash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes in Base64 or Hex. Includes HMAC with a secret key.
SecurityCertificate Decoder
Decode PEM certificates to extract Subject, Issuer, SANs, serial number, and validity dates.
SecurityPassword Generator
Create strong passwords and Diceware-style passphrases with configurable length and entropy.
SecurityJSON Formatter & Validator
Pretty-print, minify, validate, and explore JSON with a collapsible tree view.
DeveloperRegex Tester
Test regular expressions with live match highlighting, capture groups, and common presets.
DeveloperURL Parser & Builder
Parse URLs into components, edit query parameters, and rebuild URLs on the fly.
DeveloperWebhook Tester
Send custom HTTP requests with any method, headers, and JSON body. Inspect responses and save request history.
DeveloperDiff Checker
Side-by-side diff viewer for text and JSON. Highlight additions and deletions line-by-line.
DeveloperBase64 Image Encoder
Convert images to Base64 data URIs and decode them back. Drag-and-drop upload with file size comparison.
DeveloperCron Expression Parser
Parse cron expressions into human-readable schedules and preview the next execution times.
DeveloperQR Code Generator
Generate QR codes from text or URLs. Customize size and colors, then download as a PNG image.
UtilitiesColor Palette Generator
Generate complementary, analogous, and triadic color palettes from a base hex color.
Utilities