Web development in Tamil
80 free browser tools and 2 extensions
The admission form, ready by evening.
Photo resized, certificates merged into one PDF, submitted on time.
Small browser tools, extensions and Thirukkural, made for days like these.
Tools that stay in your browser
No uploads, no accounts, no limits. Built for the small jobs that interrupt your day.
PDF toolsMerge, split, compress, sign, edit, protect, OCR, convert to Word and back.MergeSplitOrganizeRotateRemove pagesExtract pagesCompressRepairOCRCompareSignEditWatermarkPage numbersCropProtectUnlockRedactImage to PDFScanWord to PDFExcel to PDFHTML to PDFPDF to imagePDF to WordPDF to ExcelPDF to PPT
Image converterPNG, JPEG, WebP, AVIF. Compress to a size, resize, in bulk.ConvertCompressResize
JSON toolsFormat and validate, convert between JSON, CSV, Excel, YAML and XML.FormatCSV to JSONJSON to CSVJSON to ExcelExcel to JSONYAML to JSONJSON to YAMLXML to JSONJSON to XML
Text caseChange case, Unicode fonts, flip, Morse, binary, word count, OCR.
Password generatorStrong passwords, passphrases, random hex, base64, UUIDs and PINs.
Regex testerLive matches, groups, flags and replace preview.
Start with these
One video from each of the most popular series. The full list is on the courses page.
Tips for improving your daily workflow
Scheduling your tasks with ease: a crontab tutorial
Python for beginners: uncovering the essentials (Tamil)
Is your Python function making this common mistake with lists?
Why sdev
Tamil and English
Concepts explained in the language you think in, without dumbing anything down.
Private by design
Every tool runs in your browser. Nothing you paste or upload leaves your device.
Free, no sign-up
No accounts, no paywalls. Open a page and start learning or converting.
Frequently asked questions
Are the sdev courses free?
Yes. Every course is a free YouTube video. There is no sign-up, paywall or hidden premium tier.
Which languages are the courses in?
Most web development and Python fundamentals are taught in Tamil. The pdfmake and Flask series are in English. Each section on the courses page is labelled with its language.
Are the developer tools private?
Yes. Every tool, from JSON to Excel to the text case converter, runs entirely in your browser. Your files and text are never uploaded to a server.
Who runs sdev?
sdev is an independent project from India that builds free courses, browser-based tools and extensions, and teaches what it learns along the way.