Toolkits
Free browser toolkits for images, developers, and finance. Pick a kit and get to work — no installs, no accounts.
What is Toolkits?
Toolkits is a home for small, focused utilities that run in your browser. ImgKit handles image compression and format conversion. DevKit covers JSON, diffs, regex, Base64, and URL encoding. FinKit applies standard formulas to the numbers you enter so you can explore loan and everyday money scenarios — educational estimates, not advice.
We keep the product intentionally simple: open a tool, paste or upload input, download or copy the result. Read more on About or reach us via Contact.
Guides from the kits
Practical explainers that sit next to the tools — formats, debugging habits, and money math basics.
- How to Reduce Image Size for Email Attachments
Practical ways to shrink JPEGs and PNGs so photos fit common email size limits without looking terrible.
- HEIC vs JPG: When to Convert iPhone Photos
What HEIC is, why websites reject it, and when converting to JPG is the right move.
- PNG to JPG: How to Convert Without Ruining Quality
When PNG-to-JPEG conversion makes sense, how lossy compression works, and how to keep photos sharp while shrinking file size.
- WebP vs PNG vs JPG: Which Format Should You Use?
A practical comparison of WebP, PNG, and JPEG for web, email, and uploads — plus when to convert between them.
- Resize Images for Instagram, LinkedIn, and Web Forms
Recommended dimensions, aspect ratios, and file-size targets when resizing photos for social platforms and strict upload forms.
- How to Pretty-Print and Validate JSON
Why formatted JSON matters for debugging APIs, how minified payloads differ, and how to catch syntax errors early.