Developer Studio
Handy developer utilities that keep your tokens, payloads and code on your machine.
41 free tools
Recommended tools
All Developer Studio tools
JSON Formatter
Developer · .jsonJSON Validator
DeveloperBase64 Encode
Developer · .txtBase64 Decode
Developer · .txtJWT Decoder
DeveloperDiff Checker
DeveloperURL Encoder
Developer · .txtHTML Entities
Developer · .txtRegex Tester
DeveloperUUID Generator
Developer · .txtHash Generator
Developer · .txtHash Identifier
DeveloperHash Verifier
DeveloperChecksum Checker
DeveloperTimestamp Converter
DeveloperCSS Minifier
Developer · .cssJS Minifier
Developer · .jsHTML Formatter
Developer · .htmlSQL Formatter
Developer · .sqlXML Formatter
Developer · .xmlYAML to JSON
Developer · .jsonMarkdown Preview
DeveloperCRON Parser
DeveloperAES Encryption
Developer · .txtHMAC Generator
Developer · .txtRSA Key Generator
Developer · .txtJSON Path Finder
Developer · .txtCSS Box Shadow Generator
DeveloperCSS Gradient Generator
DeveloperHTML Minifier
Developer · .htmlJSON Diff Checker
DeveloperHTML to Markdown
Developer · .mdMarkdown to HTML
Developer · .htmlURL Parser
DeveloperGlassmorphism Generator
DeveloperNeumorphism Generator
DeveloperSVG Blob Generator
Developer · .svgColor Palette Generator
DeveloperScreen Resolution Inspector
DeveloperUser-Agent Parser
DeveloperChmod Calculator
DeveloperRelated categories
From the blog
How to Format and Beautify JSON Online
A practical guide to format and Beautify JSON Online. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Validate JSON and Find Syntax Errors Fast
A practical guide to validate JSON and Find Syntax Errors Fast. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Base64 Encode Text (and Why Base64 Is Not Encryption)
A practical guide to base64 Encode Text (and Why Base64 Is Not Encryption). Learn the steps, common mistakes, trade-offs and how to check the result.
How to Base64 Decode Text Safely
A practical guide to base64 Decode Text Safely. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Decode a JWT Without Confusing Decoding With Verification
A practical guide to decode a JWT Without Confusing Decoding With Verification. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Compare Two Blocks of Text and Understand the Diff
A practical guide to compare Two Blocks of Text and Understand the Diff. Learn the steps, common mistakes, trade-offs and how to check the result.
How to URL Encode and Decode Text Correctly
A practical guide to uRL Encode and Decode Text Correctly. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Escape and Unescape HTML Entities
A practical guide to escape and Unescape HTML Entities. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Test and Debug a Regular Expression
A practical guide to test and Debug a Regular Expression. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Generate UUIDs: v4, v7 and v1 Explained
A practical guide to generate UUIDs: v4, v7 and v1 Explained. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Hash Text or a File (SHA-256, SHA-1, MD5 and CRC32)
A practical guide to hash Text or a File (SHA-256, SHA-1, MD5 and CRC32). Learn the steps, common mistakes, trade-offs and how to check the result.
How to Convert Unix Timestamps to Readable Dates (and Back)
A practical guide to convert Unix Timestamps to Readable Dates (and Back). Learn the steps, common mistakes, trade-offs and how to check the result.
How to Minify CSS Without Making Maintenance Painful
A practical guide to minify CSS Without Making Maintenance Painful. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Minify JavaScript Safely
A practical guide to minify JavaScript Safely. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Format and Indent HTML
A practical guide to format and Indent HTML. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Format SQL for Readability Without Changing the Query
A practical guide to format SQL for Readability Without Changing the Query. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Format and Validate XML
A practical guide to format and Validate XML. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Convert YAML to JSON Without Losing Structure
A practical guide to convert YAML to JSON Without Losing Structure. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Preview Markdown Before You Publish It
A practical guide to preview Markdown Before You Publish It. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Read a Cron Expression and Predict Its Next Run
A practical guide to read a Cron Expression and Predict Its Next Run. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Encrypt Text or a File With AES-GCM
A practical guide to encrypt Text or a File With AES-GCM. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Generate an HMAC and What It Actually Proves
A practical guide to generate an HMAC and What It Actually Proves. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Generate an RSA Key Pair and Handle the Private Key Safely
A practical guide to generate an RSA Key Pair and Handle the Private Key Safely. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Extract Values From JSON Using a Path
A practical guide to extract Values From JSON Using a Path. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Build a CSS Box Shadow That Looks Intentional
A practical guide to build a CSS Box Shadow That Looks Intentional. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Build CSS Gradients: Linear, Radial and Conic
A practical guide to build CSS Gradients: Linear, Radial and Conic. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Minify HTML Without Damaging the Page
A practical guide to minify HTML Without Damaging the Page. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Compare Two JSON Documents and Find Real Changes
A practical guide to compare Two JSON Documents and Find Real Changes. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Convert HTML to Clean Markdown
A practical guide to convert HTML to Clean Markdown. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Convert Markdown to HTML Safely
A practical guide to convert Markdown to HTML Safely. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Break a URL Into Protocol, Host, Path, Query and Hash
A practical guide to break a URL Into Protocol, Host, Path, Query and Hash. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Create a Glassmorphism Effect in CSS
A practical guide to create a Glassmorphism Effect in CSS. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Create a Neumorphism Effect in CSS Without Hurting Usability
Learn how to create a Neumorphism Effect in CSS Without Hurting Usability, what can go wrong, and how to verify the output before you rely on it.
How to Generate an SVG Blob Shape for Web Design
A practical guide to generate an SVG Blob Shape for Web Design. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Generate a Useful Color Palette From One Color
A practical guide to generate a Useful Color Palette From One Color. Learn the steps, common mistakes, trade-offs and how to check the result.
How to Check Screen Resolution, Viewport Size and Device Pixel Ratio
Learn how to check Screen Resolution, Viewport Size and Device Pixel Ratio, what can go wrong, and how to verify the output before you rely on it.
How to Parse a User-Agent String (and Why It Is Not Perfect Device Detection)
Learn how to parse a User-Agent String (and Why It Is Not Perfect Device Detection), what can go wrong, and how to verify the output before you rely on it.
How to Read and Calculate chmod Permissions
A practical guide to read and Calculate chmod Permissions. Learn the steps, common mistakes, trade-offs and how to check the result.
About Developer Studio
Format JSON, decode JWTs, test regex, diff text and more with developer tools that run entirely in your browser.
Frequently Asked Questions
No. Developer Studio runs entirely in your browser using JavaScript. Your data is read into your device's memory, processed there, and saved straight to your downloads. Nothing is sent over the network, so no one else ever receives a copy.
AnyTool Studio sets no upload limit because nothing is uploaded. The practical limit is your device's available memory, so very large files may be slow on phones or older computers. If Developer Studio struggles with a big file, try a smaller one.
Yes. Because your data never leaves your device, confidential contracts, financial records and personal files are not exposed to a third-party server. Everything is cleared from memory when you close the tab.
Yes. Developer Studio is 100% free, with no signup, no account and no usage caps.