Handy tools. Zero uploads.
Every tool runs entirely in your browser. Nothing you open or paste ever touches a server.
📌 Pinned
Developer Toolbox
Everyday utilities for developers
JSON Formatter 📌 Format, validate and minify JSON with clear error messages. Unix Timestamp Converter 📌 Convert Unix timestamps to dates and back, in seconds or milliseconds. Base64 Encode / Decode 📌 Encode and decode Base64 text or convert files to data URIs. JWT Decoder 📌 Decode JWT header and payload without your token leaving the page. Diff Checker 📌 Compare two texts and highlight changes line by line or word by word. UUID & Hash Generator 📌 Generate UUIDs and compute MD5, SHA-1, SHA-256 or SHA-512 hashes. Command Line Builder
Beta
📌 Paste a long command, edit each flag and value in its own box, copy it back.
File Toolbox
Convert and compress files privately
Image Compressor 📌 Shrink JPG, PNG and WebP images in your browser with a quality slider. HEIC to JPG Converter 📌 Convert iPhone HEIC photos to JPG instantly, no upload needed. PDF Merger 📌 Combine multiple PDFs into one file, reorder pages by drag and drop. PDF to Image 📌 Render PDF pages as PNG or JPG images and download them as a zip.
3D Printing Toolbox
Calculators and STL utilities for makers
3D Print Cost Calculator 📌 Work out the real cost of a print: filament, electricity, wear and failure rate. Filament Remaining Calculator 📌 Weigh your spool and find out how many grams and meters of filament are left. Scale STL 📌 Resize an STL to exact dimensions or fix inch/mm unit mix-ups. STL Weight Calculator 📌 Drop an STL to get its volume, size and estimated filament weight and cost.
Why your data stays private
hiptool has no backend and no upload endpoints. Tools are plain JavaScript and WebAssembly in your browser tab; open your network inspector and see for yourself. Most tools work offline once loaded. Read how it works →