All-in-one encoding and encryption solution. Supports Base64 encoding and decoding, URL encoding, MD5 & SHA hash calculation, AES & DES encryption and decryption, JWT parsing, code obfuscation and base conversion for secure development.
GeekFormat's free online AES encryption tool. Encrypt and decrypt data securely with AES-CBC, GCM, CTR, and ECB modes. Supports 128/192/256-bit keys, custom IV, and PKCS7/ZeroPadding. Perfect for API debugging, ciphertext verification, and local symmetric encryption testing — no data upload.
GeekFormat's free online Audio to Base64 converter. Instantly encode MP3, WAV, OGG, and M4A files into Base64 strings or Data URI Schemes. Perfect for embedding audio in HTML5/JS, API payload testing, and JSON data transmission. 100% client-side processing ensures your audio files never leave your device.
GeekFormat's free online Base32 encoder and decoder. Fully compliant with RFC 4648 standard. Perfect for encoding TOTP/2FA secrets, DNS labels, and case-insensitive data transmission. Instantly convert text and binary to Base32 strings with zero data upload.
GeekFormat's free online Base58 encoder and decoder. Uses the standard Bitcoin alphabet (removing 0, O, I, l). Perfect for encoding/decoding crypto wallet addresses, IPFS CIDs, and URL-safe strings. Instantly convert text and binary to Base58 with zero data upload.
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.
GeekFormat's free online Base64 Batch Encoder. Instantly encode multiple lines of text into Base64 strings simultaneously. Perfect for generating bulk API payloads, converting CSV data, and batch processing log entries. Supports standard and URL-safe Base64 with precise newline handling.
GeekFormat's free online Base64 Cleaner. Instantly remove spaces, newlines, quotes, BOMs, and other invalid characters from Base64 strings. Perfect for fixing malformed data copied from emails, PDFs, logs, or web pages before decoding. Supports regex-based character filtering.
GeekFormat's free online Data URL and pure Base64 converter. Instantly add or remove MIME type prefixes (e.g., data:image/png;base64,). Perfect for embedding inline images in HTML/CSS, reducing HTTP requests, and preparing Base64 payloads for API transmission. Supports images, SVGs, audio, and video.
GeekFormat's free online Base64 decoder. Instantly convert Base64 strings back to readable text, binary data, or files. Perfect for debugging API responses, analyzing logs, and recovering configuration values. Supports URL-safe Base64 and automatic padding correction.
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.
GeekFormat's free online Base64 encoder. Instantly convert text, strings, and Unicode characters to Base64 format. Supports URL-safe encoding and MIME line wrapping. Perfect for generating API parameters, HTTP Basic Auth headers, JWT payloads, and development testing.
Free online Base64 formatting tool. Format long Base64 strings to fixed-width multi-line display. Perfect for long string readability, screenshot comparison, print layout and manual inspection. Instant formatting with one-click copy.
Free online HEX to Base64 converter. Convert hexadecimal to Base64 encoding for byte sequence conversion, packet capture log analysis, protocol debugging and development troubleshooting. Instant conversion with one-click copy.
Free online Base64 multi-line merge tool. Quickly merge multiple Base64 segments into a single-line string. Perfect for certificates, keys, API parameters and copy repair scenarios. Instant merge with one-click copy.
Free online MIME Base64 processor. Format Base64 with email protocol line breaks or convert to single line. Perfect for email attachments, legacy system compatibility and standard format verification. Instant processing with one-click copy.
Free online Base64 padding fixer. Add or remove trailing equal signs. Perfect for decoding errors, format inconsistencies and API compatibility troubleshooting. Instant fixing with one-click copy.
Free online Base64 split tool. Split long Base64 strings into multiple lines by specified length. Perfect for layout readability, print display and manual verification. Instant splitting with one-click copy.
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 audio converter. Restore audio files from Base64, play online and download. Perfect for API debugging, voice data verification and encoded attachment restoration. Instant decoding with one-click playback.
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 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.
Free online Base64 to image converter. Restore images from Base64 with instant preview and download. Perfect for API debugging, image attachment restoration and web resource investigation. Instant decoding with one-click preview.
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 Base64 to video converter. Restore video content from Base64 with online playback and download. Perfect for API debugging, video attachment restoration and frontend resource verification. Instant decoding with one-click playback.
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.
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.
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 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 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 file hash calculator supporting MD5, SHA1, SHA256, SHA512 algorithms. Local chunk-based processing, file never uploaded. Verify known hash values for file integrity.
Free online file to Base64 converter. Quickly encode local files. Perfect for attachment transmission, frontend embedding, API debugging and data encapsulation. Instant encoding with one-click copy.
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 HMAC signature generator and verifier supporting common SHA algorithms. Perfect for API signatures, Webhook verification and security debugging. Instant generation with one-click copy.
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 image to Base64 converter. Generate image Base64 strings and Data URLs. Perfect for web inlining, small icon embedding, API transmission and frontend development. Copy results directly after conversion.
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 JWT tool for decoding, verifying and generating JWT tokens. View Header, Payload, expiration and signature details. Perfect for API authentication debugging, token troubleshooting and integration testing.
Free online MD5 hash calculator for text and files. Perfect for integrity verification, quick comparison and download file validation. Instant calculation 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 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 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.
Free online SHA1 hash calculator for text and files. Perfect for legacy system compatibility, file verification and signature testing. Instant calculation with one-click copy.
Free online SHA256 hash calculator for text and files. Perfect for download verification, API signatures, digest generation and security debugging. Instant calculation with one-click copy.
Free online SHA512 hash calculator for text and files. Perfect for high-strength verification, download validation, security testing and signature debugging. Instant calculation with one-click copy.
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 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 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 encoding and decoding tool supporting encodeURIComponent and encodeURI. Perfect for link parameters, callback URLs, signature strings and API debugging. Copy results instantly.
Free online video to Base64 converter. Convert video files to Base64 strings. Supports common formats like MP4, WebM and more. Browser local processing without upload. Perfect for API transmission and config embedding. Instant conversion with one-click copy.
