Free online tools
Powerful developer and productivity tools you can use right in your browser. No sign-up and no limits. Most run entirely on your device; the few that use our server (like Markdown to PDF) say so.
Free online tools that respect your time and your data
Browser-first
Most tools process your files on your device with no upload. The few that use our server (like Markdown to PDF) say so on the tool.
No signup, no limits
Open the page, use the tool. No account, no paywall, no watermarks.
Built by engineers
We build these because we use them. They're tuned for power users.
KSPR's free online tools cover the workflows we hit every day as a software team: converting Markdown to PDF for client reports or to a Word .docx when the client wants to edit it, splitting and merging PDFs, generating QR codes for campaigns, compressing images before they hit production, formatting and diffing JSON, sharing files between devices, capturing code screenshots for documentation, and more.
Most tools here run entirely in your browser using modern Web APIs (WebRTC, the File API, Canvas, and WebAssembly where it helps), so your files, your code, and your data never reach our servers. A few are exceptions and say so on their page — Markdown to PDF renders your document on our server (in memory, not stored), and the optional "Fix with AI" in JSON Craft sends your input to an AI provider. We don't require sign-ups, we don't inject ads, and we don't add watermarks. If a tool starts to feel slow or limited, that's a bug. Open an issue or message us and we'll fix it.
We add new tools regularly — Markdown to Word is the newest. If there's a tool you wish existed, let us know. Most of the tools you see here started as something we needed in our own work.
Need something custom built? Start a project with the team behind these tools.
This free tool is built and maintained by KSPR Technologies. We build web, mobile & AI products for clients.