Password Generator
Generate secure, random passwords with customizable length, numbers, and special characters — no data sent to any server.
Security & EncodingDeveloper ToolsFree · No sign-up
Free Security Tools Online 2026 — Hash, Encrypt & Secure Data in Browser
This hub covers free browser-based security and cryptography tools for developers, security teams, and system administrators in 2026: password generators, hash tools, encryption utilities, JWT tools, and password strength checkers — no signup required.
Updated · Reviewed by The Free AI Tools Editorial Team — Security and cryptography tools review
Top free tools
Open any tool instantly — no account or download required.
AES Encrypt/Decrypt
Encrypt and decrypt text with AES-GCM using the Web Crypto API — secure client-side encryption tool.
JWT Decoder
Decode and inspect JSON Web Tokens to view header, payload, and signature structure — essential for API debugging.
Bcrypt Toolkit
Generate and compare bcrypt hashes in one browser-based workspace - secure password hashing with no server upload.
Hash Generator
Create and compare common hash outputs for text input instantly - useful for checksums and integrity checks.
JWT Signer
Create HS256 JWT tokens from a payload, headers, and secret — test auth flows without a backend.
RSA Key Generator
Generate RSA-OAEP public and private key pairs in PEM format — essential for asymmetric encryption workflows.
Password Strength Checker
Score passwords for length, character variety, and repetition risk — fully private, nothing sent anywhere.
EXIF GPS Remover
Check image metadata for location, device, and timestamp details, then strip the fields you do not want to share. It is especially useful for press kits, listings, and personal photos shared publicly.
PDF Metadata Privacy Checker
Inspect PDF author, title, subject, timestamps, and hidden metadata before sharing files. It helps teams remove accidental identifiers from proposals, resumes, and reports without sending documents to a server.
Base64 Encode/Decode
Encode and decode text to and from Base64 format instantly in your browser — essential developer utility.
URL Encode/Decode
Encode and decode URLs with percent-encoding support — fix broken query strings and API parameters instantly.
Pronounceable Password Generator
Generate strong but memorable password phrases built from pronounceable syllable chunks.
About these tools
Security tooling in 2026 has become a standard requirement for developers and technical teams, not just security specialists. Modern web development involves routine tasks — hashing passwords, generating secure tokens, encoding JWTs, validating encryption parameters — that require quick browser-accessible utilities.
Password generation is one of the most frequently needed security utilities across roles. The password generator tools in this hub produce randomized output using browser-native cryptographic APIs.
Hashing is a foundational security operation that appears in dozens of routine developer tasks: verifying file integrity after download, confirming API request signatures, storing passwords in databases.
JWT inspection and signing tools are essential for developers working with modern authentication systems. Nearly every API and web application uses JSON Web Tokens in 2026 for session management, authorization, and service-to-service authentication.
All tools in this topic
All 45 free tools related to this topic, organised by category.
Security & Encoding
AES Encrypt/DecryptEncrypt and decrypt text with AES-GCM using the Web Crypto API — secure client-side encryption tool.Base64 Encode/DecodeEncode and decode text to and from Base64 format instantly in your browser — essential developer utility.Bcrypt ToolkitGenerate and compare bcrypt hashes in one browser-based workspace - secure password hashing with no server upload.Hash GeneratorCreate and compare common hash outputs for text input instantly - useful for checksums and integrity checks.JWT DecoderDecode and inspect JSON Web Tokens to view header, payload, and signature structure — essential for API debugging.JWT SignerCreate HS256 JWT tokens from a payload, headers, and secret — test auth flows without a backend.Password GeneratorGenerate secure, random passwords with customizable length, numbers, and special characters — no data sent to any server.Password Strength CheckerScore passwords for length, character variety, and repetition risk — fully private, nothing sent anywhere.QR Code GeneratorCreate QR codes for URLs, text, WiFi credentials, and email with one-click download — instantly in your browser.RSA Key GeneratorGenerate RSA-OAEP public and private key pairs in PEM format — essential for asymmetric encryption workflows.
Developer Tools
AI Agent Code GeneratorDescribe any task and get a complete AI agent with working code — build automation scripts, bots, and pipelines instantly.AI Diagram GeneratorGenerate visual diagrams and flowcharts from prompts with a browser-native AI workspace.AI Page Builder AgentGenerate complete, professional HTML pages from plain-text descriptions. Build landing pages, portfolios, dashboards, SaaS pages, and e-commerce sites with live preview, HTML export, Three.js 3D, Chart.js, and GSAP animations. Free, no account required.AI Page Builder AgentGenerate professional landing pages, portfolios, dashboards, and more from a text description. Live preview, HTML export, and optional Three.js 3D, Chart.js, and GSAP animations — free, no account needed.Base64 Image EncoderConvert uploaded images directly into Base64 strings — embed images inline in emails, HTML, or CSS.Class Diagram MakerDraft Mermaid-compatible UML class diagrams with a browser-based editor — visualize OOP architecture.Code ConverterConvert code between 15+ programming languages with idiomatic AI output. Python to JavaScript, Java to C#, TypeScript to Python, SQL dialect conversion, and more — no login required.Code ExplainerPaste any code snippet and get an instant plain-English explanation. Supports Python, JavaScript, TypeScript, Java, C++, Go, Rust, SQL, and 20+ languages with beginner-to-expert depth levels.Cron Expression ParserValidate cron schedules and preview upcoming run times — debug cron jobs and scheduled task expressions.CSS Minifier/FormatterMinify or beautify CSS code for production optimization or readable development — instant browser-side processing.CSV to JSON ConverterConvert CSV data to JSON and vice versa with ease — perfect for data import/export and API payload preparation.Data URI GeneratorGenerate inline data URIs from uploaded files and text assets — eliminate external HTTP requests for small assets.Environment Variables ParserParse .env file content into structured JSON and key/value tables — debug dotenv configs instantly.ER Diagram MakerCreate entity-relationship diagrams with schema notes and Mermaid output — design database schemas visually.Error Message SolverPaste any error log or stack trace and get instant root cause analysis with step-by-step fix instructions. Supports Python, JavaScript, Java, Node.js, React, and 20+ frameworks.Flowchart MakerBuild process diagrams and flowcharts from Mermaid-style syntax — visualize workflows and logic instantly.HTML to Markdown ConverterConvert raw HTML into clean readable markdown syntax — useful for blog migration and content portability.HTML/XML EscapeConvert special characters to and from HTML entities — prevent XSS and fix broken markup instantly.JavaScript Minifier/FormatterMinify or beautify JavaScript code for production builds or debugging — reduce JS bundle size instantly.JSON Formatter & ValidatorFormat, validate, and minify JSON with error highlighting — instantly beautify messy JSON responses.JSON Path FinderSearch nested JSON objects and return matching paths for keys and values — JSONPath query tool.JSON Schema Builder & ValidatorGenerate JSON Schema from sample payloads, validate example objects, and inspect required fields or type mismatches. It is useful when teams need portable contracts without spinning up a backend.JSON to XML ConverterTransform JSON objects into formatted XML markup — convert API payloads to XML for SOAP and legacy integrations.Markdown to HTML ConverterRender markdown into clean sanitized HTML with a live preview — convert .md files to web-ready markup.Pretty Log FormatterClean up JSON logs, key-value lines, and stack traces for readability — debug server logs instantly.Query String ParserParse URLs and query strings into readable key-value parameters — debug API requests and redirects instantly.Regex Escape HelperEscape plain text safely for regular-expression literals — convert strings to regex-safe patterns.Sequence Diagram MakerVisualize API and system interactions with Mermaid-compatible sequence diagrams — document microservices clearly.SQL FormatterFormat and beautify SQL queries for better readability — clean up messy SELECT statements and JOIN chains.SQL to JSON ConverterTurn SQL INSERT statements into JSON data structures — useful for data migration and API payload generation.UML Diagram Generator AICreate UML class, sequence, use-case, and ER diagrams with live preview and export-ready output.URL Encode/DecodeEncode and decode URLs with percent-encoding support — fix broken query strings and API parameters instantly.UUID GeneratorGenerate UUIDs (v4) in bulk with instant copy and export — unique identifiers for databases and APIs.XML Formatter & ValidatorPretty-print XML and flag malformed markup in your browser — format RSS, SOAP, and config XML files.YAML to JSON ConverterConvert between YAML and JSON formats instantly — essential for CI/CD, Kubernetes, and API config workflows.
Free security tools FAQs
Quick answers about the workflow, privacy, and where this tool fits in a broader job.
What hashing algorithms are available in these free security tools?
The hub includes tools for MD5, SHA256, bcrypt, and general-purpose hash generation. MD5 and SHA256 are widely used for checksums and data integrity verification. Bcrypt is the standard for password hashing in modern web applications.
Is it safe to use browser-based encryption tools for sensitive data?
For development, testing, and learning purposes, browser-based tools are convenient and reliable. For encrypting genuinely sensitive production data, use well-audited local cryptographic libraries.
What is the difference between bcrypt and SHA256 for password storage?
SHA256 is a fast hash function not designed for password storage. Bcrypt is specifically designed for password hashing with a configurable work factor that makes brute-force attacks computationally expensive. Always use bcrypt, Argon2, or scrypt for password storage.
How do I generate a secure RSA key pair for free?
Use the RSA key generator tool in this hub to create public/private key pairs directly in your browser. Choose a minimum of 2048-bit keys for modern security standards.
What does the password strength checker measure?
The password strength checker evaluates length, character variety (uppercase, lowercase, numbers, symbols), common pattern avoidance, and dictionary word presence.
Related free tool collections
Explore more curated hubs of free, no-sign-up tools.
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Explore more free tools
221+ browser-based tools across 13 categories — all free, no sign-up.