OAuth 2.0 Scope Builder — Permission String Tool
Build and decode OAuth 2.0 scope strings for Google, GitHub, Stripe, and custom providers. Toggle permissions with risk indicators, generate ready-to-use scope strings, and decode existing scope strings to understand what access they grant.
How to Use OAuth 2.0 Scope Builder — Permission String Tool
How to Use the OAuth 2.0 Scope Builder
Build Mode
Step 1: Choose a Provider
Select the OAuth provider your app integrates with:
| Provider | Notes |
|---|---|
| Uses full URL scopes such as https://www.googleapis.com/auth/drive | |
| GitHub | Uses short token-style scopes such as repo, read:user |
| Stripe | Uses two Connect scopes: read_only and read_write |
| Custom | Enter any scopes manually for non-listed providers |
Step 2: Toggle Scopes
Each scope shows:
- A human-readable label and description
- The actual scope value used in the OAuth request
- A risk indicator: low (green), medium (amber), or high (red)
Click a scope row to select or deselect it. Use Select all or Clear all for bulk actions.
Step 3: Copy the Scope String
The generated scope string appears at the bottom once at least one scope is selected. You can copy:
- The raw space-separated string (standard OAuth 2.0 format)
- The URL-encoded version (for embedding in query strings)
Decode Mode
Paste an existing scope string (space-separated) and the tool will:
- Match recognized scopes against the selected provider and explain each one
- List any unrecognized tokens separately
Switch to Custom provider to decode non-standard or internal scopes.
Risk Indicators
| Level | Meaning |
|---|---|
| Low | Read-only or limited write access |
| Medium | Write access to specific resources |
| High | Admin, full access, or destructive capability |
Always request the minimum scopes your app needs. Users are more likely to approve narrow permissions, and fewer scopes reduce your attack surface if credentials are compromised.
Principle of Least Privilege
OAuth scopes are your authorization boundary. Requesting drive:readonly instead of drive means a leaked token cannot modify or delete files. For any app:
- Start with the most restrictive scope that lets the feature work
- Add broader scopes only when users explicitly unlock advanced features
- Never request admin or delete scopes unless the feature genuinely requires them
Frequently Asked Questions
Most Viewed Tools
TOTP Code Generator — 2FA Testing Tool
Generate time-based one-time passwords from a TOTP secret key. Enter your base32 secret, choose a period and digit length, and get the current and next codes with a live countdown timer. Useful for testing and debugging 2FA integrations.
Use Tool →JSON to Zod — Schema Generator
Generate Zod validation schema code from a JSON sample object. Infers z.string(), z.number(), z.boolean(), z.array(), z.object(), and z.null() types automatically. Handles nested objects, arrays of objects with optional field detection, and outputs copy-ready TypeScript with import and z.infer type alias.
Use Tool →JSONL Formatter — Line-by-Line Validator
Format, validate, and inspect JSON Lines (JSONL) and NDJSON files. Validates each line individually, reports parse errors by line number, outputs compact JSONL or a pretty-print preview, and lets you download the cleaned file.
Use Tool →TLS Cipher Suite Checker — Strength Analyzer
Check TLS protocol version compatibility and cipher suite strength ratings against current best practices. Supports IANA and OpenSSL cipher names — rates each suite as Strong, Weak, or Deprecated and explains why.
Use Tool →Password Entropy Calculator — Crack Time Estimator
Calculate the information-theoretic bit entropy of any password or API key. Detects character set pools automatically, shows the total number of possible combinations, and estimates crack time across five attack scenarios from rate-limited web logins to GPU cracking clusters.
Use Tool →Secret Scanner — API Key & Credential Detector
Scan pasted text, code, or config files for accidentally exposed API keys, tokens, passwords, and private keys. Detects 50+ secret types across AWS, GitHub, Stripe, OpenAI, and more — all client-side, nothing leaves your browser.
Use Tool →Screen Size Converter — Diagonal Dimension Tool
Calculate screen width and height from diagonal size and aspect ratio. Convert between inches and centimeters for displays, TVs, and monitors with instant dimension calculations.
Use Tool →TOML Config Validator — Syntax Error Finder
Validate TOML configuration file syntax and report errors with line numbers. Paste any TOML content — Cargo.toml, pyproject.toml, config.toml — and instantly see a green checkmark with key counts and structure stats, or a precise error message pointing to the exact line. Includes a collapsible JSON structure preview to confirm what was parsed.
Use Tool →Related Privacy & Security Tools
API Key Hasher — Secure Storage Tool
Hash API keys using SHA-256, SHA-512, or PBKDF2 before storing them in your database. Generates a Node.js verification snippet and shows the recommended storage format — all 100% client-side using the Web Crypto API.
Use Tool →PGP Key Generator — Browser-Based Key Pair Tool
Generate PGP public and private key pairs for email encryption and code signing. Supports ECC (Curve25519) and RSA up to 4096-bit. Entirely browser-side — keys never leave your device.
Use Tool →TOTP Code Generator — 2FA Testing Tool
Generate time-based one-time passwords from a TOTP secret key. Enter your base32 secret, choose a period and digit length, and get the current and next codes with a live countdown timer. Useful for testing and debugging 2FA integrations.
Use Tool →TLS Cipher Suite Checker — Strength Analyzer
Check TLS protocol version compatibility and cipher suite strength ratings against current best practices. Supports IANA and OpenSSL cipher names — rates each suite as Strong, Weak, or Deprecated and explains why.
Use Tool →IP Allowlist Generator — Firewall Rule Builder
Generate ready-to-paste IP allowlist and blocklist rules for nginx, Apache, iptables, UFW, and AWS Security Groups. Enter IP addresses or CIDR ranges, select your target platform, and get production-ready firewall config instantly.
Use Tool →Password Entropy Calculator — Crack Time Estimator
Calculate the information-theoretic bit entropy of any password or API key. Detects character set pools automatically, shows the total number of possible combinations, and estimates crack time across five attack scenarios from rate-limited web logins to GPU cracking clusters.
Use Tool →Content Security Policy Generator — XSS Shield Builder
Build Content Security Policy headers interactively. Toggle directives like script-src, style-src, and img-src, select allowed source tokens, and add custom origins. Instantly outputs your CSP as an HTTP header, meta tag, Nginx directive, or Apache header.
Use Tool →SSH Key Generator — Ed25519 & RSA Key Pair Tool
Generate Ed25519 and RSA 4096-bit SSH key pairs entirely in your browser. Keys are never sent to any server — 100% client-side using the Web Crypto API.
Use Tool →Share Your Feedback
Help us improve this tool by sharing your experience