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Base64 Tools Online
Browse 16 online Base64 tools for processing, converting, validating, and managing Base64 data and files in your browser.
Use this collection of 16 Base64 tools to process, convert, validate, and manage Base64 data and files through a browser-based interface without installing software.
Tools
16 matching tools
Format Conversion
Base64 Converter
Encode and decode data to/from Base64 format with URL-safe options
Format Conversion
Base64 Encoder/Decoder
Encode and decode Base64 strings
Design
Base64 to Image Converter
Convert Base64 encoded images back to image files with support for various formats
Format Conversion
Base64URL Encoder/Decoder
Encode and decode Base64URL (URL-safe Base64 variant used by JWT/JWS/JWE), with conversions between standard and URL-safe Base64
Security
CRC32 Checksum
Compute the CRC32 checksum (IEEE 802.3 polynomial) of any text or raw bytes. Output as hex, decimal or binary. Accepts plain text (UTF-8) or raw bytes via hex/base64 input.
Development
Data URI Generator
Convert files into Data URIs (Base64 or percent-encoded) for inlining images, fonts, and assets directly into HTML, CSS, or Markdown
Security
Digital Signature Generator
Sign a message with a private key or verify a signature with a public key — supports RSA-PSS (SHA-256), ECDSA (P-256), and Ed25519. Pure client-side crypto (Node crypto.createSign/createVerify), no network. Paste a PEM key to sign or to verify a base64 signature. This tool signs/verifies; it does not generate key pairs.
Security
Ed25519 / X25519 Keygen and Signature Verifier
Generate Ed25519 or X25519 keypairs from random or deterministic seed text, then sign or verify messages
Security
Excel Field-Level Decryptor
Decrypt specific fields in Excel files using various decryption methods to restore encrypted information
Security
Excel Field-Level Encryptor
Encrypt specific fields in Excel files using various encryption methods to protect sensitive information
Security
Field-Level Data Decryptor
Decrypt specific fields in CSV data using various decryption methods to restore encrypted information
Security
Field-Level Data Encryptor
Encrypt specific fields in CSV data using various encryption methods to protect sensitive information
Cryptography
Hash Algorithm Comparator
Hash the same input with MD5, SHA-1, SHA-256, SHA-512, BLAKE2b, and BLAKE3 at the same time and compare them side by side: output length, hex/Base64 digest, security status (broken / modern), and a relative speed benchmark. Great for teaching, choosing a hashing algorithm, or sanity-checking checksums.
Design
Image to Base64 Converter
Convert images to Base64 encoding with support for various formats and quality settings
Security
Secure Random Generator
Generate cryptographically secure random key material driven by entropy budget — request N bits of entropy, get hex/base64/base64url output. Also supports custom-alphabet strings via crypto.randomInt (rejection-sampled, no modulo bias). Use this instead of Math.random()-based tools for any secret/key/token.
Format Conversion
Text Encryptor/Decryptor
Simple text encryption and decryption using various algorithms
Tags
Related Tags
Encryption
40 toolsUse 40 online encryption tools for encrypting, decrypting, and working with cipher, AES, and RSA data in your browser.
AES
5 toolsBrowse 5 AES tools in your browser. Processing runs on Elysia Tools servers; text inputs are not stored and uploaded files are deleted after 6 hours.
Conversion
369 toolsBrowse 369 online conversion tools for transforming data and files between supported formats. Use them in your browser with secure server-side processing.
Data Security
4 toolsUse 4 online data security tools in your browser. Processing runs on Elysia Tools servers; text inputs are not stored and uploaded files are deleted after 6 hours.
Files
143 toolsBrowse 143 online Files tools for processing, converting, validating, and managing files in your browser.
Format Conversion
142 toolsBrowse 142 format conversion tools for converting files and data between supported formats in your browser.
Tool usage guide
FAQ
What can I do with Base64 tools?
You can process, convert, validate, and manage Base64 data and files using the available online tools.
Do I need to install software to use these tools?
No software installation is needed. You can operate the tools through your browser.
How is my data handled?
Operations are submitted from the browser and processed on Elysia Tools servers. Text inputs are not stored, and uploaded files are automatically deleted after 6 hours.