# Privacy & Security Tools

> Encryption, password generation and checking, EXIF removal, redaction, face blurring, hashing, TOTP codes and certificate decoding.

- URL: https://qilingtools.com/en/tags/privacy
- Price: Free, no sign-up
- Privacy: Runs locally in the browser; files are never uploaded

## Tools (31)

- [Password Generator](https://qilingtools.com/en/password): Free online random password generator: choose length, character sets and look-alike exclusions, generate several at once with a strength meter, all locally.
- [JWT Decoder](https://qilingtools.com/en/jwt): Free online JWT decoder: decode the header and payload of a JSON Web Token, show expiry and issued-at times, all locally without uploading the token.
- [Hash / Checksum](https://qilingtools.com/en/hash): Free online hash calculator: SHA-1, SHA-256, SHA-384 and SHA-512 of text or any file through the browser crypto API. Files never leave your device.
- [Blur / Pixelate Image](https://qilingtools.com/en/image/mosaic): Free online image redaction tool: drag to mark any area and hide it with pixelation, blur or a black box — several areas at once, for faces and plates.
- [Remove EXIF Data](https://qilingtools.com/en/image/remove-exif): Free online EXIF viewer and remover: see the camera, capture time and GPS location hidden in a photo, then strip the metadata losslessly before sharing.
- [ID Card Copy](https://qilingtools.com/en/image/id-card-copy): Free online ID card copy maker: front and back laid out at the real 85.6×54mm on one A4 page, with an optional anti-misuse watermark. Export JPG or PDF.
- [Encrypt PDF](https://qilingtools.com/en/pdf/encrypt): Free online PDF encryption: set an open password and restrict printing, copying, editing and annotating with AES-256. Everything runs on your device.
- [Unlock PDF](https://qilingtools.com/en/pdf/decrypt): Free online PDF unlocker: enter the password you already know and export a PDF without it, or lift owner-only limits on printing and copying. Runs locally.
- [Edit PDF Properties](https://qilingtools.com/en/pdf/metadata): Free online PDF metadata editor: view and change the title, author, subject and keywords, or wipe every property and timestamp for privacy. Runs locally.
- [Redact PDF](https://qilingtools.com/en/pdf/redact): Free online PDF redaction: draw boxes over names, ID numbers or amounts and black them out for good — those pages are re-rendered so the text is gone.
- [Blur Faces](https://qilingtools.com/en/image/blur-faces): Free online face blurring: AI finds every face in a photo, including small ones in group shots, and pixelates, blurs, blacks out or covers them with an emoji.
- [Image Steganography](https://qilingtools.com/en/image/steganography): Free online image steganography: hide a message in the least significant bits of a PNG, optionally AES-256 encrypted, and reveal hidden text again.
- [Text Encryption & Decryption](https://qilingtools.com/en/encrypt): Free online text encryption: AES-256-GCM or CBC with a password (PBKDF2, OpenSSL-compatible output), raw key + IV mode, RSA-OAEP and HMAC signatures.
- [JWT Generator & Signer](https://qilingtools.com/en/jwt-generate): Free online JWT generator: edit the header and payload, sign with HS, RS, PS or ES 256/384/512, make RSA / EC key pairs, and verify with exp/nbf checks locally.
- [Sanitize PDF](https://qilingtools.com/en/pdf/sanitize): Free PDF sanitizer: find and remove JavaScript, auto-run and launch actions, links, attachments, comments, forms and metadata, with a before/after report.
- [Password Strength Checker](https://qilingtools.com/en/password-checker): Test password strength privately in your browser: entropy and crack time, detects common passwords, keyboard walks, dates and l33t, optional breach check.
- [EXIF Editor](https://qilingtools.com/en/image/exif-edit): Free EXIF editor: view all JPEG tags, change or bulk-shift the date taken, set or remove GPS, edit camera, artist and copyright, with no recompression.
- [Bcrypt Generator & Checker](https://qilingtools.com/en/bcrypt): Generate and verify password hashes online: bcrypt (cost 4–14, $2a/$2b/$2y), Argon2id, scrypt and PBKDF2, auto-detecting PHP, Django, Flask and passlib formats.
- [SSL Certificate Decoder](https://qilingtools.com/en/cert-decoder): Decode SSL/TLS certificates online: subject, issuer, days to expiry, SANs, key usage, OCSP/CRL, SCTs and SHA-256 fingerprints, with chain and signature checks.
- [TOTP Generator](https://qilingtools.com/en/totp): Generate and verify TOTP / HOTP 2FA codes from a Base32 secret or otpauth:// URI. SHA1/256/512, 6–8 digits, custom period, countdown, new secrets and QR codes.
- [Blur Faces in Video](https://qilingtools.com/en/video/blur-faces): Free online video face blur: AI detects and tracks every face to blur or pixelate it; keep chosen faces, add regions by hand, export MP4 with audio.
- [Htpasswd Generator](https://qilingtools.com/en/htpasswd): Generate .htpasswd entries with bcrypt, APR1-MD5, SHA-512/256 crypt or {SHA}, merge into existing files, verify passwords and get nginx / .htaccess config.
- [Classical Cipher Lab](https://qilingtools.com/en/math/cipher): Encode and decode Caesar/ROT13, Vigenère (with Kasiski auto-crack), Playfair, rail fence, affine, Bacon and substitution ciphers, plus an Enigma I simulator.
- [HTTP Security Headers Checker](https://qilingtools.com/en/security-headers): Paste raw HTTP response headers to get an A+ to F grade with checks for HSTS, CSP, X-Frame-Options, cookies, CORS and more, plus fixes and a CSP builder.
- [SSH Key Generator](https://qilingtools.com/en/ssh-keygen): Generate SSH key pairs in your browser: Ed25519, RSA 2048/3072/4096 or ECDSA, with OpenSSH keys, passphrases, PKCS#8, fingerprints and randomart.
- [PDF Signature Verifier](https://qilingtools.com/en/pdf/signatures): Verify PDF digital signatures: recompute digests, check RSA/ECDSA signatures, view the certificate chain, timestamps and LTV data, and spot edits after signing.
- [Invisible Character Detector](https://qilingtools.com/en/invisible-chars): Detect and remove zero-width characters, bidi controls (Trojan Source), non-breaking spaces, soft hyphens, control chars, homoglyphs and full-width letters.
- [ZIP Password](https://qilingtools.com/en/zip-password): Free online tool to password-protect a zip or strip the password from one you can open: AES-256 or ZipCrypto, with garbled filenames repaired on the way.
- [File Checksum](https://qilingtools.com/en/checksum): Free online checksum tool: compute MD5, SHA-1, SHA-256 and CRC32 for several files at once, compare against a published value and handle multi-GB files.
- [Peer-to-peer send](https://qilingtools.com/en/p2p): Free peer-to-peer file transfer: scan one QR code to pair a phone and a computer, then files go straight between them — no upload and no size limit.
- [China Phone Number Check](https://qilingtools.com/en/phone-check): Free checker for Chinese mobile numbers: validate the format, identify the carrier by prefix, flag MVNO, IoT and satellite ranges, and export them as CSV.