MY DEVELOPER TOOLKIT
Useful tools.
A lighter workflow.
A collection of 36 browser utilities I’ve put together for development, design, writing and technical SEO. Practical tools, local processing, and no account required.
Browse all free online tools
36 TOOLS / FREE TO USE. NO ACCOUNT NEEDED.
Image Compressor
Compress JPG, PNG and WebP images in your browser.
Image Resizer
Resize images to custom dimensions without uploading.
Image Converter
Convert images to JPG, PNG or WebP.
JSON Formatter
Format, validate and minify JSON.
Base64 Encoder / Decoder
Encode or decode Unicode text safely.
Word Counter
Count words, characters, sentences and reading time.
QR Code Generator
Generate downloadable QR codes from text or URLs.
Password Generator
Generate strong random passwords using browser cryptography.
Color Converter
Convert HEX colors into RGB and HSL values.
SEO Meta Preview
Preview your Google-style title and description snippet.
URL Encoder / Decoder
Encode URL components or decode percent-encoded text.
Query String Parser
Inspect URL query parameters, including repeated keys.
UUID Generator
Generate random version 4 UUIDs with browser cryptography.
Timestamp Converter
Convert Unix seconds, milliseconds and ISO dates to UTC.
CSV to JSON
Turn CSV rows into JSON, including quoted and multiline fields.
JSON to CSV
Convert an array of JSON records into downloadable CSV.
HTML Entity Encoder
Encode HTML special characters or decode character references.
Regular Expression Tester
Test JavaScript patterns in a worker with an execution timeout.
Text Difference Checker
Compare two texts and inspect line additions and removals.
Text Case Converter
Convert text to upper, lower, title, sentence or camel case.
Text Cleaner
Trim lines, normalize spaces and remove empty lines.
Duplicate Line Remover
Remove repeated lines while keeping their original order.
Line Sorter
Sort lines alphabetically, in reverse or with natural numbers.
Reading Time Calculator
Estimate reading time using an adjustable words-per-minute rate.
URL Slug Generator
Make a readable lowercase URL slug from a title.
Keyword Occurrence Counter
Count exact word and phrase occurrences in a text draft.
Meta Tag Generator
Create escaped title, description, canonical and social HTML tags.
Robots.txt Generator
Draft crawler directives and a sitemap URL for your website.
XML Sitemap Generator
Build sitemap XML from a list of public canonical URLs.
UTM Campaign URL Builder
Add campaign source, medium and campaign parameters to a URL.
Color Contrast Checker
Measure an opaque sRGB color pair against WCAG contrast ratios.
CSS Gradient Generator
Preview a two-color linear gradient and copy its CSS.
Box Shadow Generator
Adjust offsets, blur and spread, then copy the CSS shadow.
Border Radius Generator
Design individual rounded corners with a live preview.
Aspect Ratio Calculator
Simplify dimensions to a ratio and calculate a proportional size.
SHA-256 Hash Generator
Calculate a SHA-256 digest of UTF-8 text on your device.
Your work stays on your device.
Files and text are processed locally in your browser. No registration, no uploads to OurJS.
A FEW THINGS TO KNOW
Good questions. Clear answers.
Are all the tools free?
Yes. All 36 tools currently listed are free to use, without creating an account.
Do you upload or store my files?
No. The image and text utilities run in your browser. OurJS does not receive your selected files or pasted text.
Can I use the tools on my phone?
Yes. The tools have responsive layouts and work in modern mobile browsers. Very large images can take longer or exceed memory on some devices.
Can I use these tools offline?
These are browser-based utilities, but the site needs a connection to load its pages and scripts. Offline availability is not guaranteed.