PDF & documents
Securely redact a PDF
Permanently hide sensitive areas by rebuilding the document.
100% localNew
Use this toolTag
Resources for “security”
Discover 26 resources related to security.
Tools
Security & privacy
HMAC Generator & Verifier
Generate or verify SHA-256, SHA-384 and SHA-512 HMAC values locally.
100% localNew
Use this toolSecurity & privacy
AES Encrypt & Decrypt
Encrypt and decrypt text locally with AES-256-GCM and a password.
100% localNew
Use this toolSecurity & privacy
X.509 Certificate & CSR Inspector
Inspect an X.509 certificate or CSR in PEM format locally.
100% localNew
Use this toolPDF & documents
Password protect a PDF
Encrypt a PDF locally with a password and AES-256 without uploading your document.
100% localNew
Use this toolPDF & documents
Unlock a PDF
Remove PDF password protection locally when you know the current password.
100% localNew
Use this toolDevelopment
HTTP Header Analyzer
Analyze HTTP headers to review security, caching, CORS, and cookie behavior.
100% local
Use this toolSecurity & privacy
Basic Auth Generator
Generate an HTTP Basic Auth header and usage examples.
100% local
Use this toolSecurity & privacy
JWT Encoder
Create a locally signed JWT with HS256, HS384, or HS512.
100% local
Use this toolSecurity & privacy
SRI hash generator
Generate a Subresource Integrity hash for a file or pasted content.
100% local
Use this toolSecurity & privacy
Password policy generator
Generate a clear password policy from the security rules you choose for your organization.
100% local
Use this toolSecurity & privacy
Password strength checker
Evaluate password strength from its length and character composition directly in your browser.
100% local
Use this toolSecurity & privacy
JWT inspector
Inspect a JWT to review its header, payload, timestamps, and main token information.
100% local
Use this toolSecurity & privacy
Hash comparator
Compare two hashes or checksums to immediately verify whether they match exactly.
100% local
Use this toolSecurity & privacy
Hash generator
Generate a text hash using several common hashing algorithms.
100% local
Use this toolSecurity & privacy
JWT decoder
Decode a JWT to inspect its header, payload, and main token information more easily.
100% local
Use this toolSecurity & privacy
Password generator
Generate a random password using the length and character types you choose.
100% localFeatured
Use this toolGuides and articles
TutorialBest practicesBeginner
How to securely redact a PDF before sharing it
Learn why covering text is not enough, how secure PDF redaction removes sensitive information and why sanitization matters before sharing.
10 September 20262 minRead
GuideBest practicesBeginner
Web security: understand the essential protections of a website
Understand the layers that protect a website: HTTPS, HTTP security headers, CSP, SRI, authentication, passwords and integrity.
29 August 20262 minRead
GuideBest practicesBeginner
Content Security Policy (CSP): reduce XSS risks and unwanted loads
Learn how to introduce a CSP progressively, understand its main directives, Report-Only mode, nonces and common mistakes.
29 August 20261 minRead
GuideBest practicesBeginner
HTTP security headers: which ones to enable and why
Understand HSTS, CSP, X-Content-Type-Options, Referrer-Policy and Permissions-Policy and how to verify the headers actually returned.
29 August 20261 minRead
GuideBest practicesBeginner
Subresource Integrity (SRI): verify external resource integrity
Understand how SRI hashes help detect unexpected changes to static third-party scripts and stylesheets, and where SRI does not apply.
29 August 20261 minRead
GuideBest practicesBeginner
JWT: understand structure, signature, expiration and common mistakes
Learn what a JWT contains, why decoding is not verification, how claims such as exp, nbf, iss and aud work, and common security mistakes.
29 August 20261 minRead
GuideBest practicesBeginner
Passwords: generation, strength and useful policies
Understand why length and uniqueness matter, how password managers, MFA and passkeys complement passwords, and how servers should store them.
29 August 20262 minRead
GuideBest practicesBeginner
Hashes, integrity and fingerprint comparison: what a hash can really prove
Distinguish hashing from encryption and encoding, understand SHA-256 and SHA-3, collisions and the limits of a hash without authentication.
29 August 20262 minRead
GuideBest practicesBeginner
PDF and privacy: edit a document without sending it to a server
Understand why local processing matters for sensitive PDFs, what it reduces, and which privacy precautions remain necessary before sharing a document.
29 August 20262 minRead