Free online tools that respect your time and your data.

Free, fast online tools for developers, students, and everyday tasks. Most run entirely in your browser, so your data never leaves your device.

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Count, clean, convert, and reformat text. Useful for writers, students, and anyone working to a word or character limit.

Word CounterCount words, characters, sentences, and paragraphs as you type, with the counting rules written down.
Character CounterSoonCheck text against character limits for social posts, meta descriptions, and form fields.
Case ConverterSoonConvert text between sentence case, title case, UPPERCASE, lowercase, camelCase, and snake_case.
Text CleanerSoonStrip extra spaces, line breaks, and invisible characters pasted in from other documents.

Format, validate, encode, and decode the data formats developers work with daily — JSON, Base64, JWT, UUIDs.

JSON FormatterFormat and indent messy JSON, with clear error messages that point at the exact problem.
JSON ValidatorSoonCheck whether JSON is valid and get the line and column of the first syntax error.
JSON MinifierSoonStrip whitespace from JSON to reduce payload size before shipping it over the wire.
Base64 EncoderSoonEncode text or files to Base64 without uploading anything to a server.
Base64 DecoderSoonDecode Base64 back to readable text or a downloadable file, entirely in the browser.
UUID GeneratorSoonGenerate v4 UUIDs in bulk using the browser's built-in cryptographic randomness.
JWT DecoderSoonInspect the header and payload of a JSON Web Token locally — tokens are never transmitted.

Compress, resize, crop, and convert images directly in your browser. Files are never uploaded to a server.

Image CompressorSoonShrink JPEG, PNG, and WebP files in your browser with a live before-and-after comparison.
Image ResizerSoonResize images to exact pixel dimensions or a percentage, with aspect ratio locking.
Image CropperSoonCrop images to a freeform selection or a fixed ratio for avatars, thumbnails, and banners.
JPG to PNG ConverterSoonConvert JPG images to PNG when you need lossless output or transparency support.

Convert between units, timestamps, and colour formats without hunting for the right formula.

Unit ConverterSoonConvert length, weight, temperature, and volume between metric and imperial units.
Timestamp ConverterSoonConvert Unix timestamps to human-readable dates and back, across time zones.
Color ConverterSoonConvert colours between HEX, RGB, HSL, and OKLCH with a live preview of each value.

Straightforward calculators for everyday percentages, dates, and quantities — with the working shown.

Percentage CalculatorSoonWork out percentages, percentage change, and reverse percentages with the formula shown.
Age CalculatorSoonCalculate an exact age or the duration between two dates in years, months, and days.

Preview, generate, and check the small technical details that affect how pages appear in search results.

Meta Tag PreviewSoonPreview how a title and meta description will truncate in search results and social cards.
URL Slug GeneratorSoonTurn a title into a clean, readable URL slug with accents and punctuation handled correctly.
Robots.txt GeneratorSoonBuild a valid robots.txt with the crawl rules you actually intend, and understand each line.

Guides that explain the concepts behind the tools.

How Long Should a Meta Description Be?Google truncates by pixel width, not characters — and 155 characters of ordinary prose already overflows.
How Long Should a Blog Post Be?SoonWhether word count affects rankings, where the 'longer is better' idea came from, and what actually decides length.
How to Format JSONFormat JSON in your editor, from the terminal, or in code — and why the three formatters on your machine disagree with each other.
How to Compress Images Without Losing QualitySoonWhere the quality cliff actually sits for JPEG, PNG, and WebP, and how to find it for your images.
Lossy vs Lossless Compression, ExplainedSoonWhat each method throws away, when the difference is visible, and which format to reach for.
What Is Base64 Encoding and When Should You Use It?SoonWhy Base64 exists, why it is not encryption, and the cases where it genuinely helps.