About
Nelstack
Free tools for everyone. Free. Browser-based. No signup.
What we are
Nelstack brings together free tools for working with images, PDFs, documents and everyday calculations — without signing up.
Our image, PDF, signature and stamp tools are useful wherever you work. Financial calculators, metal rates and bill formats focus on Indian rules and conventions.
Convert and edit files, recognize text with OCR, and handle privacy tasks such as PDF redaction and metadata removal. Choose the tool that fits your task and review the result.
We are not a bank, broker, jeweller or tax filing service. Rates and calculator results are for planning only, not financial or legal advice.
Our tools
- FinanceMetal rates, income tax planner, FD, EMI, SIP and more financial tools
- Bill GeneratorIndian bill & receipt formats with live preview and PDF
- Online SignatureDraw or type a free signature PNG — private, no signup
- Stamp MakerFree online stamp & seal maker — PNG, SVG, stamp a PDF
- Image ToolsResize, compress, convert and edit images, remove backgrounds, and extract text from photos.
- PDF ToolsMerge, split, convert and edit PDFs, recognize text with OCR, fill forms and remove sensitive content.
- Text ToolsCount words, change case, clean up and compare text, convert numbers and Markdown — all in your browser.
- Security ToolsGenerate passwords and UUIDs, encode Base64 and URLs, hash and encrypt data, and decode JWTs and certificates — all in your browser.
- UtilitiesPick random numbers, draw winners from a list of names and read QR codes from images or your camera — all in your browser.
- Data ToolsFormat JSON, convert CSV and Excel files, and move data between YAML, XML and TOML — all in your browser.
- Code ToolsFormat and minify HTML, CSS, JavaScript and SQL, test regular expressions, explain cron schedules and convert curl commands — all in your browser.
- ConvertersConvert units, Unix timestamps and time zones, colours and contrast, px to rem, number bases and percentages — all in your browser.
- Web ToolsGenerate meta and Open Graph tags, robots.txt, sitemaps, schema markup and redirects, build UTM links and look up status codes — all in your browser.
- WhistleChrome extension — aliases, fuzzy search, pinned hotkeys
How we work
- Free to use — no accounts or paywalls.
- Read our Privacy policy for details about file handling, contact forms and analytics.
- Metal rates are indicative retail references, not an official IBJA feed. Calculator outputs are estimates — verify before you act.
Questions or corrections? Contact us. Or read Privacy.
Page last reviewed: 9 November 2026.