Security & Encryption
Encryption, hashing, and identity checks don't require server round-trips. Generate strong passwords, compute MD5 or SHA checksums for files, inspect JWT tokens, or encrypt with AES, DES, and RSA — all computed right in your browser tab.
Security & Encryption
MD5 Hash Generator
Free online MD5 tool with 16- or 32-character hex output, uppercase and lowercase. Generate MD5 hashes for data verification.
Hash Generator
Free online hash generator supporting MD5, SHA-1, SHA-256, SHA-512 algorithms. Generate text hashes instantly for data verification and password storage.
File MD5 Verification Tool
Free online file MD5 checksum tool to calculate file MD5 hash values. Verify file integrity, detect tampering, ensure downloaded files are safe.
File MD5 Modifier
Free online MD5 modifier tool to change file MD5 by appending random data. Batch processing up to 5 files, local processing protects privacy.
File Hash Verification Tool
Free online file hash calculator supporting MD5, SHA-1, SHA-256, SHA-512 and more. Calculate file hashes in one click, verify file integrity.
Password Generator
Free online password generator with customizable length and character sets. Create strong random passwords locally in your browser.
JWT Parsing Tool
Free online JWT parser to decode and verify JSON Web Tokens. View Header and Payload content, debug API authentication issues.
JWT Generator
Free online JWT generator to create tokens with custom Header and Payload. Supports multiple algorithms, generate test JWTs quickly.
AES Encryption & Decryption Tool
Free online AES encryption and decryption tool for AES-128/192/256 with CBC, GCM, and ECB modes. Local browser processing protects your data.
DES Encryption & Decryption Tool
Free online DES and 3DES encryption/decryption tool with ECB and CBC modes plus PKCS7 padding. All processing happens in your browser.
RSA Encryption & Decryption Tool
Free online RSA encryption and decryption tool. Generate key pairs, encrypt with a public key, and decrypt with a private key in your browser.
What this category can do
Security tools focus on hashes, checksums, passwords, JWTs and encryption workflows. They are useful for checking file integrity, inspecting token claims, generating strong passwords and testing AES, DES or RSA inputs. This category works with secrets and cryptographic representations; network tools instead check remote hosts and certificates.
Most tools process input in the browser when possible. For files, tokens, documents or network checks, review the selected tool before using sensitive data.
Common use cases
- Compare a downloaded file against an MD5 or SHA checksum before using it.
- Inspect JWT header, payload and expiry while debugging login or API authorization.
- Encrypt and decrypt sample text to verify algorithm, key, IV and padding choices.
FAQ
Can a hash be decoded back to the original value?
No. Hashes are one-way digests. You can compare them, but you cannot reliably recover the original input.
What is the difference between hashing and encryption?
Hashing is for integrity or identity checks and is not reversible. Encryption is reversible with the correct key.
Is MD5 still safe?
MD5 is fine for casual file fingerprints, but not for password storage or modern security decisions.
Why does JWT verification fail?
The algorithm, secret, public key, expiry time or claims may not match what the verifier expects.
Related Categories
Encoding & Decoding
Data rarely arrives in the format you need. Encode to Base64, URL-encode a string, escape JSON, convert CSV to SQL, decode QR codes, zip or unzip files, and more. Most encoding tools run entirely in your browser, so common conversions stay on your device.
Developer Tools
The small stuff that eats up a developer's day: looking up HTTP status codes, generating UUIDs, writing cron expressions, checking MIME types, parsing User-Agent strings, or scaffolding TypeScript types from JSON. Bookmark this page — it's faster than digging through docs.
Network Tools
Troubleshooting connectivity? Check your public IP, ping a host, scan open ports, query WHOIS records, verify SSL certificates, or test WebSocket connections. Run network diagnostics without opening a terminal.
