Crefims

Base64 & Cryptographic Hash Generator

Encode/decode Base64 text and files, generate SHA-256, SHA-512, and MD5 digests, and verify checksum integrity with Web Crypto.

Capabilities

Key Features

  • Dual functionality: High-speed Base64 text/file converter and multi-algorithm hash generator
  • Hardware-accelerated cryptographic digests via native Web Crypto API (SubtleCrypto)
  • Calculates SHA-256, SHA-512, SHA-384, SHA-1, and MD5 digests concurrently
  • Interactive Checksum Verifier with instant match validation against expected hashes
  • File & Image to Base64 Data URI converter with instant preview and CSS snippet generator
  • Full Unicode and UTF-8 multi-byte encoding protection (no latin1 atob/btoa character crashes)
  • Hex case toggling between standard lowercase and uppercase output formats
  • 100% private client-side execution keeping confidential passwords, keys, and files local
Quick Guide

How to use

1

Select mode (Base64 or Hash)

Toggle between the Base64 Converter tab and the Cryptographic Hash Generator tab depending on your task.

2

Enter text or drop a file

Type or paste your text string into the input area, or drag and drop any local document or image.

3

Review digests and generated formats

Inspect the instant real-time hash values or generated Base64 Data URI strings across all formats.

4

Verify checksum or copy output

Paste an expected checksum to verify integrity, or click the copy icon beside any hash algorithm.

Technical Guide

About Base64 & Cryptographic Hash Generator

Base64 & Cryptographic Hash Generator is an all-in-one data encoding and cryptographic hashing utility. Encode or decode text strings and binary files to Base64 data URIs with complete UTF-8 Unicode support. Generate cryptographic digests (SHA-256, SHA-512, SHA-384, SHA-1, and MD5) using high-speed hardware-accelerated browser Web Crypto APIs, and verify file integrity checksums with zero server telemetry.

FAQ

Frequently Asked Questions

Never. All hashing algorithms leverage your browser's native Web Crypto API (window.crypto.subtle). Files and text remain completely inside your browser's memory and are discarded immediately upon closing the page.

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