Free Online Tools for PDF, Images, Text, Calculations & Code
Edit, convert, optimize, compare, calculate and format right in your browser.
- 25 toolsPDF Tools25Edit · Merge · Compress · Word ↔ PDF
- 14 toolsImage Tools14Resize · Compress · Convert · Remove BG
- 25 toolsCalculators25EMI · GST · SIP · Age · BMI · Units
- 21 toolsInvoices & Receipts21GST invoice · Rent receipt · Salary slip
- 32 toolsText & Lists32Remove duplicates · Sort · Find & replace
- 12 toolsCompare & Diff12Diff checker · Text · JSON · Word/PDF
- Resume CheckerATS score · Keyword match
- 18 toolsData Converter18JSON ↔ CSV · YAML · XML · SQL
- 5 toolsCode Formatter5JSON · SQL · HTML · CSS · JS
- 10 toolsEncode / Decode10Base64 · URL · HTML · Hex
- 4 toolsHash Generator4MD5 · SHA-256 · HMAC
- 2 toolsJWT Tools2Decode · Verify · Encode
- 2 toolsCode Visualizers2JS Event Loop · React Fiber
- All 170+ tools
PDF Studio Suite
Edit, convert and organize PDFs
Click existing text to edit it, fill in forms, add a drawn or typed signature, run OCR on scans, and merge or compress files without uploading them.
- Edit Text
- Fill Forms
- OCR
- Sign
Hover to pause · click a card behind to bring it forwardSwipe or tap the arrows to see each studio
PDF Studio Suite
Start here
Flagship Tools
The tools people use most. Open one and start right away.
- PDF EditorClick any text in a PDF to change it, then download.PDF StudioOpen
- Compress PDFShrink a PDF to fit upload and email size limits.PDF StudioOpen
- Image ResizerResize and crop photos, including form and exam sizes.Image StudioOpen
- EMI CalculatorMonthly loan EMI, total interest and schedule.Calculator StudioOpen
- Diff CheckerCompare two texts and see exactly what changed.Compare StudioOpen
- GST Invoice MakerGST invoice with CGST/SGST or IGST, UPI QR and PDF.Business StudioOpen
- JSON FormatterFormat, validate and minify JSON.Formatter StudioOpen
- Word to PDFTurn a .docx document into a PDF.PDF StudioOpen
- Remove BackgroundMake an image background transparent.Image StudioOpen
- GST CalculatorAdd or remove GST from any amount.Calculator StudioOpen
Why people use it
Why techyCoderWorld?
Free tools that work in your browser, with a plain note wherever a server or AI is involved.
How we handle your filesYour files stay with you
PDFs, text, code and calculations are processed inside your browser tab and never leave your device. Images are too, except a few heavy exports that are processed in memory on our server and never stored. AI features (resume scanner, AI explanations, alt text) send content to Google Gemini.
Made for large files
Heavy jobs such as formatting big JSON files and encoding GIFs run in a background worker, so the page stays responsive while they finish.
No watermarks, no sign-up
Exported files come out clean, with no watermark added. Most tools work without an account. You sign in to use credits and some AI features, such as the resume scanner and image alt text.
How It Works
Most tools need no account and nothing to install.
Pick a tool
Search for what you need, or browse PDF, image, calculator, text and code tools.
Add your text or file
Paste text or code, or choose a file from your device.
Copy or download the result
Check the preview, then copy the output or download the finished file.
Frequently Asked Questions
Privacy, pricing and credits, and how the visualizers work.
Something else? Contact us
Are my files or resumes uploaded to any server?
Most tools (PDF Studio, Formatter, Data, Compare, Calculators, Visualizers) process your files locally inside your browser tab. Nothing is uploaded or stored. Image Studio also runs in your browser; only .ico export, exact-file-size presets and phone photos over 12 megapixels are processed on our server, in memory, and never stored. AI features send content to Google Gemini: the ATS Resume Scanner (your resume is stored in your account, with self-service export and deletion), the Compare AI explanation, and image alt text.
Is techyCoderWorld free to use?
Yes. The converters, calculators, formatters and visualizers are free and need no login. AI features, such as the detailed ATS resume analysis, use credits.
How do credits work?
You get 3 free resume scans a day. After that, AI features use credits: 10 for a resume scan and 2 for an image alt-text scan. Credits come with a subscription or a one-time pack, and pack credits never expire.
How do the code visualizers work?
They animate prepared examples step by step: the call stack and the microtask and task queues for the JavaScript event loop, and how React Fiber walks and updates a component tree. They show these scenarios; they do not run your own code.
