Free online tools that run 100% in your browser

No sign-up. No uploads. No server. Every JSON, code, image and AI tool runs directly on your device — your files stay completely private. Free forever.

31Free tools
100%In-browser processing
0Sign-ups or limits

JSON & Developer Tools

Convert, format and transform data instantly
{"}JSON FormatterBeautify, validate and minify JSON in one click CSVJSON to CSVConvert JSON arrays of objects into clean CSV tables JSONCSV to JSONFlip any spreadsheet data into JSON objects IMGImage to JSONEncode images to base64 JSON for APIs and embeds PNGJSON to ImageRender JSON into a beautiful shareable PNG

Code & Developer Tools

Beautify or minify your favorite languages free
</>HTML FormatterBeautify or minify HTML for production CSSCSS FormatterReadable stylesheets or tiny minified CSS JSJavaScript / jQuerySafe formatting and Terser minification LDSchema MarkupFormat and validate JSON-LD for rich results LIQLiquid FormatterBeautify Shopify and Jekyll templates PHPPHP FormatterClean indentation or minified PHP code PYPython FormatterPEP-8 style indentation and blank lines SQLSQL FormatterReadable queries with uppercase keywords

AI Image Tools

Free, instant and private image format conversion
HEICHEIC to JPGOpen iPhone photos on any PC or Android device PNGHEIC to PNGLossless conversion with full quality WEBPHEIC to WebPTiny web-ready files from Apple photos PNGJPG to PNGHigh-quality lossless JPG conversion JPGPNG to JPGCompress photos down with a quality slider WEBPJPG to WebPUp to 34% smaller files for faster websites JPGWebP to JPGUse WebP images anywhere JPG is required WEBPPNG to WebPKeep transparency while cutting file size PNGWebP to PNGLossless WebP conversion for editing PNGAVIF to PNGLossless AVIF conversion, every pixel kept JPGAVIF to JPGUse AVIF photos wherever JPG is required WEBPAVIF to WebPBroader web support, modern compression AVIFJPG to AVIFUp to 50% smaller files at same quality AVIFPNG to AVIFKeep transparency, cut size dramatically AVIFWebP to AVIFThe newest standard, even smaller images

AI Tools

Free AI tools that run offline in your browser
AIAI SummarizerSummarize long text privately, no upload AIAI DetectorEstimate if text was written by AI, offline AIAI HumanizerMake AI text read naturally — no key needed

Blogs & How To Articles

Plain English answers to real questions, with tools to match
BlogHow to Open HEIC FilesiPhone photos refusing to open? The fix on every platform. BlogWhat Is a HEIC File?Why your iPhone saves photos in HEIC and what that means. BlogJPG vs PNG vs WebPWhich image format to use, without the guesswork. BlogCompress Images Without Losing QualityThe quality slider sweet spot for photos and websites. BlogHow to Fix Invalid JSONThe six mistakes behind almost every JSON error, decoded. BlogJSON vs CSVWhich data format wins for spreadsheets, APIs and configs. BlogWhy Minify HTML, CSS and JSWhat minifying saves and when it can hurt your layout. BlogSchema Markup ExplainedStructured data and rich results for non developers. BlogMake AI Text Sound HumanFix the flat rhythm that gives AI writing away. BlogHow to Detect AI TextWhat AI detectors really measure, and their limits.

Frequently asked questions

Are the tools on FreeClickTools really free?

Yes. Every tool is free with no account, no file limits and no watermark. The site is funded by ads.

Are my files uploaded to a server?

No. All JSON, code and image processing runs 100% in your browser. Files never leave your device. The AI tools run offline models in your browser too.

Do I need to sign up?

No registration, no email, nothing. Open a tool and use it immediately.

Do any tools require an API key?

No. Every tool works without keys. Summarizer, Detector and Humanizer are fully offline; HTML/CSS/JS formatting uses free open-source engines fetched as libraries.