Encoding & Crypto

Free online sensitive string comparison tool. Supports secure string comparison and common difference checking. Perfect for token verification, password comparison, signature verification and teaching demonstrations. Instant comparison with one-click view.

Free online binary converter. Convert text to binary (01 strings) and binary to text bidirectionally. Perfect for computer science learning, protocol understanding and encoding debugging. Instant conversion with one-click copy.

Free online Caesar cipher encryption and decryption tool. Set custom shift values for text encoding and decoding. Perfect for cryptography learning, CTF challenges and puzzle solving. Instant conversion with one-click copy.

Free online Morse code translator. Convert text to Morse code and Morse code to text bidirectionally. Perfect for amateur radio, cryptography learning and fun encoding. Instant conversion with audio playback.

Free online hexadecimal converter. Convert text to Hex and Hex to text bidirectionally. Perfect for packet analysis, protocol debugging, byte stream inspection and encoding learning. Instant conversion with one-click copy.

Free online video to Base64 converter for MP4, WebM, AVI, and more. Generate raw Base64 or Data URL for HTML embedding, API payloads, testing, and debugging directly in your browser.

Convert Base64 video data to playable MP4/WebM/OGG files in-browser with automatic Data URL detection. All processing is local with no server upload. Ideal for API debugging and frontend video preview.

Free online image to Base64 converter with Web Worker acceleration. Convert PNG, JPG, WebP, GIF, SVG, BMP, AVIF, HEIC to Base64 strings locally in your browser. Zero upload, privacy-safe, with real-time progress display.

Decode Base64 encoded data to previewable images and download. Supports PNG/JPG/WebP/GIF/SVG and 7+ formats. Perfect for API image debugging, inline resource restoration, and encoding validation. Runs locally in browser.

Free online text to Base64 converter. Quickly encode plain text, supporting Chinese, English and multi-line text. Commonly used for API parameter transmission, config conversion and debugging scenarios. Instant encoding with one-click copy.

Free online Base64 to text converter. Quickly restore readable plaintext. Perfect for API response viewing, log investigation, config recovery and daily decoding. Instant decoding with one-click copy.

Free online file hash checker. Compute MD5, SHA-1, SHA-256, SHA-512 in your browser. Toggle case and auto-compare an expected value for downloads.

Free online converter for any file type to Base64. Supports images, PDF, certificates, archives. Browser-based processing with no server upload, ideal for API parameters, Data URI embedding, and development debugging. One-click copy.

Free online Base64 to file converter. Quickly restore original files and download. Perfect for attachment restoration, API debugging, config data recovery and encoded content export. Instant decoding with one-click download.

Free online tool to encode MP3, WAV, OGG, and M4A audio files into Base64 strings or Data URIs. Runs entirely in your browser — no upload — for HTML5 embedding, API payloads, and JSON config use cases.

Convert Base64 to MP3/WAV/OGG/AAC online. Decode & play in browser, download locally. Supports Data URLs. 100% client-side, no server uploads.

Free online AES encrypt/decrypt tool supporting AES-CBC, AES-GCM, and AES-CTR modes with AES-128/192/256 key sizes. Includes PBKDF2-SHA256 key derivation with 100,000 iterations, real-time password strength checks, and fully client-side browser processing with no upload.

Free online DES encryption and decryption tool supporting DES, 3DES and Triple DES modes. Perfect for legacy system integration, protocol debugging and cryptographic testing. Instant encryption with one-click copy.

Free online Base32 encoder decoder with RFC 4648, Base32hex, Crockford, z-base-32, file conversion, padding checks, hex output, and local browser processing.

Online Base58 encode/decode tool with Base58Check, file input, hex view, and custom alphabets. Useful for address validation, short identifiers, and binary payload wrapping, all in your browser.

Free online Base64 encode/decode tool with UTF-8/ASCII/ISO-8859-1, Standard/URL-Safe/MIME variants. Real-time overhead and RFC 2045 wrapping. Runs locally.

Free online Base64 decoder. Instantly convert Base64 to UTF-8/ASCII text, fix padding, and decode URL-Safe variants. Perfect for API debugging. Runs locally.

GeekFormat's free online Base64 Diff Checker. Instantly compare two Base64 strings side-by-side to find character-level differences, truncation issues, and encoding inconsistencies. Features smart whitespace ignoring and precise mismatch highlighting. Perfect for API debugging, data integrity verification, and frontend/backend consistency checks.

Online Base64 split tool that wraps long Base64 strings into multiple lines by character count or byte count. Supports RFC 2045 MIME 76-character standard, PEM 64-character preset, custom width, selectable line endings, and one-click merge back to single line. Browser-local processing with no uploads.

Merge multi-line Base64 into a single line. Strips spaces, line breaks, and tabs. Runs in your browser with no upload; copy and download as txt.

Format long Base64 online: custom line width (64/76/80/100), indent (0/2/4). Great for screenshots, print, code review. Browser-side, original data preserved.

Free online Base64 format validator. Quickly determine if strings are valid, if padding is correct, and help troubleshoot decoding failures. Perfect for API debugging, log analysis and encoding verification. Instant validation with one-click view.

Online Base64 batch encoder turning multi-line text into Base64 line by line. Supports Standard and URL-safe, UTF-8, runs in the browser, copy or download.

GeekFormat's free online Base64 Batch Decoder. Decode hundreds of Base64 strings at once with line-by-line processing. Perfect for bulk log recovery, API response debugging, and CSV data cleaning. Features automatic whitespace trimming and error tolerance for invalid lines.

Free online Base64 cleaner tool that removes invalid characters per RFC 4648 standard. Provides three independent options: remove whitespace, remove non-Base64 characters, auto-complete padding. Outputs strictly compliant Base64 strings, all processing done locally in browser.

Free online Base64 padding tool. Calculates = padding per RFC 4648, adds or removes it, fixes strings not multiple of 4. Runs locally in browser.

Free online Base64 length statistics tool. Calculate decoded size and help detect truncation. Perfect for API debugging, file transmission and encoding integrity checking. Instant statistics with one-click view.

Free online Base64 to HEX converter. Convert Base64 to hexadecimal for byte stream analysis, packet capture log comparison, protocol debugging and low-level data investigation. Instant conversion with one-click copy.

Online Base64 DataURL tool to convert between plain Base64 and data URLs. Auto-detects MIME type, strips whitespace, runs locally in your browser.

Online bi-directional Base64 and Hex converter supporting Hex to Base64 and Base64 to Hex. Automatically handles space-delimited input and 0x prefixes. Base64 to Hex supports lowercase/uppercase output, live conversion with error hints, copy and download results. Pure browser local processing, ideal for packet capture analysis, protocol debugging, and binary log transcoding.

Free online Base85/ASCII85 encoding and decoding tool. Perfect for compact text payload conversion, protocol debugging and special character set handling. Instant conversion with one-click copy.

Free online HMAC signature generator and verifier supporting HMAC-SHA256/384/512/SHA1/MD5. Perfect for Stripe/GitHub/Shopify/Slack webhook signature verification. Hex/Base64/Base64URL output formats. 100% browser-based, keys never leave your device.

Free online PBKDF2 key derivation tool. Set password, salt, iteration count and output length. Perfect for protocol integration, cryptography testing and key parameter verification. Instant generation with one-click copy.

Free online MD5 hash calculator supporting text, file, batch line-by-line, and HMAC-MD5 modes. UTF-8/Latin1 encoding, uppercase output, 8-char grouping, chunked file hashing for large files. ⚠️ MD5 is NOT secure for passwords.

Free SHA-256 hash generator for text, files & batches. 5 algorithms at once, Hex/Base64, drag-drop, 100% client-side. No upload.

Online SHA1 hash calculator that instantly generates 40-character hexadecimal digests from text. Supports text and file hashing with local browser processing for privacy, compatible with Git, SVN, and Linux workflows.

Free SHA-512 hash calculator: text, file, batch, HMAC modes. Local browser compute via Web Crypto API. SHA-384 and SHA-512/256 variants supported.

Free online JWT workbench: decode, verify, and generate JSON Web Tokens in one place. Supports 13 algorithms (HS256/HS384/HS512, RS256/RS384/RS512, ES256/ES384/ES512, PS256/PS384/PS512, EdDSA). Both PEM and JWK keys. Auto-generates key pairs. Decodes exp/iat/nbf claims. 100% client-side Web Crypto — token never leaves your browser.

Free online HTML entity encoder and decoder for web escaping, rich text processing, frontend debugging and special character conversion. Instant processing with one-click copy.

Free online Unicode escape converter supporting \uXXXX, U+ code points and HTML entity formats. Perfect for frontend debugging, text escaping and encoding troubleshooting. Instant conversion with one-click copy.

Free online URL encode/decode tool supporting encodeURIComponent, encodeURI, RFC 3986 modes. Real-time encoding highlight, batch mode, Query Only mode. Browser-local processing.

Free online Base64URL converter. Bidirectional conversion between standard Base64 and URL Safe Base64. Perfect for JWT, URL parameters and secure token scenarios. Instant conversion with one-click copy.

Online MIME Base64 formatter that wraps lines to 76 characters or restores them to a single line per RFC 2045. Ideal for email attachment encoding, S/MIME signatures and legacy system compatibility. Processed locally in your browser with no uploads.

Free online Java code obfuscator. Perfect for source code protection, example publishing, course assignments and small project distribution. Instant processing with one-click copy.

Free online JavaScript obfuscator for frontend script protection, demo code publishing, reducing source readability and lightweight code anti-copying. Instant processing with one-click copy.

Free online PHP code obfuscator. Perfect for script distribution, source code protection, demo project publishing and basic readability reduction. Instant processing with one-click copy.

Free online Python code obfuscator. Perfect for script sharing, course assignment publishing, small tool distribution and source code readability reduction. Instant processing with one-click copy.