Devglan Online Tools and Cryptography Utilities

Devglan provides free online developer tools for cryptography, security, encoding, hashing, encryption, decryption, and image metadata analysis.

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Latest posts

• Spring AI Made My RAG Pipeline Surprisingly Elegant

  Building a modern RAG app became much simpler with Spring AI advisors, hybrid retrieval, streaming chat responses and memory management.

• Production RAG Smart Customer Support with Spring AI

  Build a production-grade RAG-based customer support automation system using Spring AI, Elasticsearch, and Ollama with hybrid search, query rewriting, and reranking.

• Building a Stateful AI Chat Application with Spring AI, Memory & Semantic Cache

  Learn how to build a stateful AI chat application using Spring AI. Implement chat memory, semantic caching with Redis, and RAG-based question answering step by step.

• AI & Machine Learning Terminology for Java Developers: A Practical Guide

  Learn AI terminology with real-world examples using Spring Boot, Redis, and Elasticsearch. A complete guide for Java developers entering AI.

• Building an AI Knowledge Assistant with Spring AI, Ollama & RAG (Step-by-Step Guide)

  Learn how to build an AI Knowledge Assistant using Spring AI, Ollama, and RAG. Step-by-step Java tutorial covering document ingestion, embeddings, and vector storage.

• Building Your Own AI-Powered Search Engine with Spring Boot and Elasticsearch

  Learn how to build an AI-powered semantic search engine using Spring Boot and Elasticsearch. Generate embeddings, index documents, and perform vector search using Elasticsearch ML models.

• Online PGP Key Generator and Inspector (Client-Side)

  Generate and inspect PGP keys online using OpenPGP.js. Create passphrase-protected keys, view fingerprints, expiry, algorithm, and key strength securely in your browser.

• PGP Encryption

  Encrypt & decrypt PGP messages online using your browser. Generate PGP keys, encrypt plaintext, and decrypt messages securely with client-side PGP encryption.

• String Size in Bytes Calculator

  Calculate string size in bytes and characters. Supports UTF-8, Unicode, emoji strings, JSON payload size, and database varchar limits.

• PGP File Encryption Online – Secure File Encrypt

  Encrypt and decrypt files online using PGP. Secure client-side encryption with RSA keys, multiple recipients, and zero file uploads.

• JWT Online Decoder

  Decode a JSON Web Token (JWT) online to view header and payload in readable JSON. Client-side decoding with no data sent to any server.

• AES vs ChaCha20: Which Encryption Algorithm Should You Use?

  Learn the real differences between AES and ChaCha20, including nonce vs IV, performance trade-offs, and when to use each algorithm.

• Argon2 vs bcrypt vs scrypt: Real-World Password Hashing Experience

  A practical comparison of Argon2 vs bcrypt vs scrypt based on real implementation experience. Learn when to use each and how to migrate safely.

• JWT Validator Online

  Validate a JSON Web Token (JWT) by verifying its signature and claims like expiration, issuer, and audience. Secure client-side JWT validation.

• JWT Generator Online

  Generate JWT tokens online with custom headers and claims. Supports HS256, HS384, HS512 for API testing and development.

• Regex Tester, Generator and Explainer

  A powerful online regex tester, generator, and explainer. Validate regular expressions, visualize matches and capture groups, debug failures, and analyze performance across engines.

• ECC Key Pair Generator and ECDSA Tool (secp256k1, P-256)

  Generate ECC key pairs, sign and verify ECDSA signatures, and derive shared secrets using secp256k1 and P-256. 100% client-side and secure.

• Operating System Objective Questions

  This operating system quiz focuses on medium to advanced level concepts with carefully curated objective questions, correct answers, and clear explanations. Ideal for interviews and in-depth OS learning.

• javascript Objective Questions

  This JavaScript quiz contains carefully curated objective questions with correct answers and clear explanations. It is designed for frontend and backend developers, interview preparation, and deep understanding of modern JavaScript concepts.

• MD5 Hash Generator Online

  Generate MD5 hashes instantly for text input using this fast and free online hash generator.

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