Free online security and data tools
Generate strong passwords, compute file checksums, encrypt text with AES-256, make and read QR codes and barcodes, open CSV and Excel files and create or open ZIP archives. Sensitive input never leaves your device.
Most used
- QR code generator
- Strong password generator
- Hash generator and file checksum calculator
- Excel to CSV converter
- CSV viewer and column filter
- AES-256 text encryption and decryption
- Word and character counter
- ZIP creator and extractor
All tools in this suite
- Vector QR Code GeneratorCreate styled QR codes with your colors and logo, exported as SVG or PNG.
- QR Code Reader & ScannerDecode QR codes from images or a live camera feed.
- Cryptographic Password GeneratorGenerate strong passwords and passphrases with measured entropy.
- File Checksum & Hash CalculatorCompute MD5, SHA-1, SHA-256 and SHA-512 to verify file integrity.
- AES-256 Text Encryptor / DecryptorEncrypt and decrypt text with a passphrase using AES-256-GCM.
- Subnet & IP CalculatorWork out network ranges, masks, broadcast addresses and CIDR splits.
- Word & Character CounterLive counts, reading time and keyword density for any text.
- CSV Viewer & Column FilterOpen large CSV files and search, sort and filter columns instantly.
- Excel & CSV ConverterConvert XLSX, XLS and ODS to CSV or JSON and CSV back to Excel, sheet by sheet, on your device.
- ZIP Creator & ExtractorCreate ZIP files from any files, or open ZIP, TAR and GZ archives and save what you need.
- Barcode GeneratorMake Code 128, EAN, UPC, Data Matrix, PDF417 and Aztec barcodes as crisp SVG or PNG.
Why use these tools
- Random values come from the browser cryptographic generator, not Math.random.
- Streaming hashes handle files of any size without loading them whole.
- Passphrase encryption with AES-256-GCM, and Argon2id key derivation for stronger protection.
- Camera scanning stays on your device.
Questions and answers
Are the generated passwords safe?
Yes. They come from crypto.getRandomValues, the same source browsers use for encryption keys, and are never stored or sent.
Which hash algorithms are available?
MD5, SHA-1, SHA-256, SHA-384, SHA-512, BLAKE3 and CRC-32, computed as a stream so large files do not fill memory.
Can I trust the encryption tool?
It uses standard, well reviewed primitives: AES-256-GCM through the Web Crypto API with keys derived by PBKDF2 or Argon2id. Choose a long passphrase, because that is the part an attacker would target.