12 free security tools Security tools. Free, no sign-up.
Protect, encrypt, and check your files and data locally.
- Most tools run in your browser
- Uploads deleted after processing
- Free, no account
About this category
About security tools
Security tools are only trustworthy if your data stays private while you use them. That is why hashing, encoding and generator tools here run entirely on your device, so passwords and keys are never sent anywhere. PDF protection and unlocking run on our server over HTTPS, and the file is deleted as soon as it is processed. Use them to protect PDFs, hash or encode data, generate secure values, and verify information with confidence that nothing is being logged or stored.
How it works
- 1Pick a toolOpen any tool from the list. There is nothing to install and no account to create.
- 2Add your file or textDrop a file, paste text or type your values. Most tools work right in your browser.
- 3Get your resultDownload or copy the result. Files sent to our server are deleted once it is ready.
The collection
All security tools
Search, filter or sort to find the right one. Every tool opens instantly.
12 tools, all free
PII Anonymizer for ChatGPT & AI Prompts
Remove emails, phone numbers, card numbers, API keys and other personal data from text before you paste it into ChatGPT, Claude or Gemini, then restore the real values in the AI’s reply. Runs in your browser.Open tool
File Checksum & Hash Calculator
Calculate SHA-256, SHA-1, and SHA-512 cryptographic file checksums client-side for integrity verification.Open toolFile Signature Checker
Identify file types by magic bytes and signatures. Free, private, browser-based file signature verification tool.Open toolHTTP Header Checker
Check HTTP response headers for security, SEO, and performance insights. Free, private, browser-based HTTP header analysis tool.Open toolPassword Strength Checker
Analyze password strength with entropy, character mix, and security score. Free, private, browser-based password checker tool.Open tool
Password, Passphrase & PIN Generator
Generate strong random passwords (8–64 characters), memorable six-word passphrases, or 6-digit PINs using your browser’s secure random generator.Open toolPDF Flatten Form Fields & Annotations
Convert fillable PDF form fields and interactive annotations into uneditable static vector graphics.Open tool
Protect PDF with a Password
Add a password to a PDF with AES-256 encryption. The file cannot be opened, printed or copied from without the password.Open tool
Redact PDF
Permanently remove names, numbers and other sensitive text from a PDF. Matching text is deleted from the document and covered with a black box.Open toolSSL Certificate Checker
Check SSL/TLS certificate validity, expiration, issuer, and security details. Free, private, browser-based SSL certificate verification tool.Open toolToken Generator
Generate secure random tokens for authentication, API keys, and security. Free, private, browser-based token generator tool.Open tool
Unlock PDF
Remove the password from a PDF you are allowed to open. Enter the password once and download an unprotected copy.Open tool
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