35free tools
6categories
0accounts or uploads
100%client-side
Small tools, properly made.
Tools Peak is a workbench of thirty-five single-purpose online tools — generators, converters, " "checkers, calculators and counters. Every one of them runs entirely in your browser, so nothing " "you type, paste or open ever leaves your device.
Security
Passwords, hashes and IDs — lock things down properly.
SecurityPassword GeneratorStrong random passwords with a live entropy meter.
SecurityPassphrase GeneratorMemorable multi-word passphrases, hard to guess.
SecurityPassword Strength CheckerEntropy score, crack-time estimate and pattern warnings.
SecurityHash GeneratorMD5, SHA-1, SHA-256, SHA-384, SHA-512 — computed locally.
SecurityUUID GeneratorVersion-4 UUIDs — one at a time or fifty at once.
Images
Compress, resize, convert and favicon-ify without uploads.
ImagesImage CompressorShrink JPG, PNG and WebP photos in your browser.
ImagesImage ResizerResize images to exact pixel dimensions.
ImagesImage ConverterConvert between PNG, JPEG and WebP freely.
ImagesFavicon GeneratorFavicons from any image or letter, in the four sizes that matter.
Colour
Pickers, palettes, gradients and contrast ratios.
ColourPalette GeneratorFive-colour palettes from harmony rules, one click.
ColourGradient GeneratorSmooth CSS gradients with live preview and fallback.
ColourContrast CheckerExact contrast ratios with WCAG AA/AAA verdicts.
ColourColour StudioOne colour in HEX, RGB, HSL and HSV, plus tints and shades.
ColourImage Colour PickerPick any colour straight from an uploaded image.
Data
JSON, Base64 and URL encoding — developer staples.
DataJSON FormatterFormat, validate and minify JSON with clear errors.
DataJSON to CSV ConverterJSON to CSV and back, with quoting done right.
DataBase64 Encoder & DecoderEncode and decode Base64 text with proper UTF-8 safety.
DataURL Encoder & DecoderPercent-encode URLs correctly — full, component or decode.
DataRegex TesterTest regex patterns live, with matches highlighted.
DataUnix Timestamp ConverterTimestamps to dates and back, UTC and local.
DataMeta Tag GeneratorSEO and social meta tags in one clean snippet.
Text
Count, convert, compare and generate placeholder text.
TextDiff CheckerSee every change between two texts, line by line.
TextWord CounterLive words, characters, sentences and reading time.
TextCase ConverterUPPER, lower, Title, camelCase and 9 more — one click.
TextLorem Ipsum GeneratorPlaceholder text by paragraph, sentence or exact word count.
TextMarkdown PreviewerWrite Markdown on the left, read the result on the right.
TextText to SpeechPaste text, pick a voice, press Speak.
TextTyping Speed TestWPM, accuracy and live progress in 60 seconds.
Calculators
Everyday maths: BMI, age, units and percentages.
CalculatorsBMI CalculatorYour BMI with healthy range, metric or imperial.
CalculatorsAge CalculatorExact age in years, months and days — plus totals.
CalculatorsUnit ConverterConvert length, weight and temperature — live.
CalculatorsPercentage CalculatorDiscounts, shares and change — three calculators in one.
CalculatorsStopwatch & TimerA precise stopwatch with laps, plus a countdown alarm.
CalculatorsRandom Number GeneratorFair draws, dice and coin flips — no repeats unless you want them.
CalculatorsEMI CalculatorLoan EMI, total interest and a yearly payoff schedule.
Why another tools site?
Because most of them treat the tool as bait. The real product is usually the sign-up form, the file you upload, or the data trail you leave behind. Tools Peak is built the other way round: the tool is the product. You arrive, you do the job, you leave — and since every calculation happens inside your browser, there is no server quietly keeping a copy of what you made.
Built like a tool, not a funnel
Each page follows one template: the working tool at the top, then a plain-language explanation of what it does, its honest limits, and answers to the questions people actually ask. No countdown timers, no fake download buttons, no maze of ads between you and the result. If a tool cannot do something, the page says so.
Latest articles
ArticleEMI Explained: How Loans Really Charge You InterestWhat EMI means, how the formula works in plain words, amortisation, flat vs reducing balance, and prepayment — explained generally.
ArticleUnix Time: The Number That Runs the Internet's ClocksSeconds since 1970: why Unix time exists, how UTC keeps it honest, the 2038 problem, and the curious case of leap seconds.
ArticleMeta Tags in 2026: What Actually Matters for SEOTitle and description still matter, keywords are dead, social cards win clicks — the 2026 field guide to which meta tags deserve your time.
ArticleHow Typing Speed Is Measured (and How to Get Faster)WPM vs CPM, gross vs net speed, why accuracy beats raw pace, touch-typing basics, and a practice method that actually works.
ArticleDigital Colour: How Screens Mix Millions of HuesRGB, HEX and HSL explained, additive vs subtractive colour, bit depth, gamuts, and why the same colour looks different on every screen.
Frequently asked questions
Are the tools really free?
Yes. Every tool on this site is free, with no account, no quota and no watermark on anything you download or copy.
Is anything I type or open uploaded?
No. All processing happens in your browser with JavaScript. There is no upload endpoint for the tools to send your data to — you can verify it by loading a tool, disconnecting from the internet, and watching it keep working.
Do the tools work offline?
Once a page has loaded, yes. The calculations are local, so a dropped connection does not stop the work.
Why does every tool live on its own page?
So each page can explain its tool properly and load fast, and so you can bookmark exactly the tool you use every week.
Can I suggest a new tool?
Yes — the contact page is the place. The collection grows by request, and gaps are listed honestly rather than filled with half-finished tools.