AppAdd: everyday tools that run in your browser
Open a tool, use it, leave. No login and no upload: your files stay on your device.
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All tools
Image tools
5- Image Compressor Reduce the file size of a JPEG, PNG or WebP image in your browser. Your image is never uploaded.
- Image Resizer Resize a JPEG, PNG or WebP image to exact pixel dimensions or a percentage, entirely in your browser.
- JPG to WebP Convert a JPEG image to the smaller WebP format without uploading it anywhere.
- WebP to JPG Convert a WebP image to a widely compatible JPEG. Transparent areas become white.
- Aspect Ratio Calculator Find the simplified aspect ratio of a width and height, or work out the missing side for a given ratio.
Text tools
4- Word Counter Count words, characters, sentences, paragraphs and reading time as you type. Runs in your browser.
- Character Counter Count characters with and without spaces. The primary count is grapheme clusters, so emoji count as one.
- Case Converter Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case and more.
- Remove Duplicate Lines Delete repeated lines from a list, keeping the first occurrence of each in its original order.
Calculators
4- Percentage Calculator Work out X% of Y, or what percent X is of Y, with the formula shown.
- Percentage Change Calculator Calculate the percentage increase or decrease between an old and a new value.
- Age Calculator Find your exact age in years, months and days from a date of birth, plus days to the next birthday.
- Date Difference Calculator Count the days between two dates. The end date is not counted unless you include it.
Developer tools
4- JSON Formatter Validate, beautify or minify JSON and see exactly where it is invalid. Strict RFC 8259 JSON only.
- Base64 Encode/Decode Encode text to Base64 or decode Base64 back to text. Unicode-safe, with a URL-safe option.
- Unix Timestamp Converter Convert Unix timestamps (seconds or milliseconds) to dates and dates back to timestamps.
- UUID Generator Generate random version 4 UUIDs, one or up to 100 at a time, using your browser's secure random generator.