Free tools. Nothing leaves.
Twenty-two utilities for developers and everyday work. Each one runs in this tab; nothing is uploaded, nothing is stored.
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Every tool,
one page.
Twenty-two live today.
- JSON Formatter & Validator Beautify, validate and minify JSON, with the error position. Open
- Base64 Encoder / Decoder Text or files to Base64 and back, UTF-8 safe. Open
- URL Encode / Decode Escape a component or a full URL, then decode it back. Open
- MD5 / SHA-256 Hash Generator MD5, SHA-1, SHA-256, SHA-384 and SHA-512 in one pass. Open
- CSS Minifier Remove comments and whitespace from CSS, with the bytes saved. Open
- UUID v4 Generator Generate up to 100 random version-4 UUIDs at once. Open
- JWT Debugger Read a token's header and payload; expiry decoded to dates. Open
- SQL Formatter Split clauses onto their own lines and upper-case keywords. Open
- Character Counter Characters, words, lines and UTF-8 bytes as you type. Open
- Case Converter lower, UPPER, Title, Sentence, camel, snake, kebab, Pascal. Open
- Unix Timestamp Converter Seconds and milliseconds to dates, in UTC and local time. Open
- Unit Converter Length, mass, volume, temperature, speed, data and more. Open
- Time Zone Converter Convert a date and time between zones, DST handled. Open
- Age Calculator Exact age in years, months and days, plus next birthday. Open
- RGB ⇄ HEX Converter RGB, HEX and HSL, with a colour preview. Open
- Color Picker / Converter Pick a colour and copy it as HEX, RGB or a CSS variable. Open
- Percentage Calculator X% of Y, X is what % of Y, and percentage change. Open
- BMI Calculator Body mass index from metric or imperial height and weight. Open
- Password Generator Strong local passwords with length and character options. Open
- Placeholder Text Generator Placeholder paragraphs for mockups and layout tests. Open
- Word Counter Words, characters, sentences and reading time. Open
- Trip Fuel Cost Calculator Distance × consumption × fuel price, in litres or gallons. Open
Paste. Press. Done.
Three of the tools, working here. Nothing below sends a request.
Questions.
Do you store anything I paste?
No. Every tool is JavaScript running in your tab. There is no upload request and no server that receives your input. The only data that exists is what you can see on screen.
Do I need an account?
No. There is no sign-up, no login and no saved workspace. Open a tool, use it, close the tab.
Are the tools really free?
Yes. Tools App is funded by aumenso LLC, the agency behind it. There is no paywall and no usage limit.
Can I use the output commercially?
Yes. What you make with a tool is yours. There is no licence attached to the converted text, the hash or the formatted file.
Where is the tool list?
Seven tools are live today: JSON, Base64, URL, hashing, timestamps, units and colour. The rest of the catalogue is being built; the finder below searches what exists now.
Can I ask for a new tool?
Yes. Suggest a tool and describe what you need. Requests that can run client-side get built first.
Find the right tool.
Need this built for your business?
aumenso builds websites, branding, SEO, GoHighLevel funnels and custom software for agencies and businesses across North America and Europe. These tools are the same team's work, given away free.