AscendLab
Tool library

All free browser-based tools, organized in one place.

Search 175 no-account tools by task, category, file type, or output.

No accountBrowser-side175 tools

Search 175 live tools

Format JSONClean pasted data.Count wordsMeasure copy fast.Compress imageShrink files locally.Make QRCreate scannable codes.MortgageEstimate payments.Convert videoSwitch MP4/WebM.

Popular starters

Open a tool now; it will appear in recent tools later.

Full list
Online Word CounterEnglish, Chinese, and limitsJSON FormatterJSON cleanup and path inspectionQR Code GeneratorInstant share assetsImage CompressorReduce image file size

Task routes

Filter the library

DeveloperPublishingVideoFinanceTimeDesign

Categories

Image toolsVideo toolsDeveloper toolsFinance calculatorsHealth calculatorsTime toolsConvertersContent planningMath helpers

Top tools

20 quick links

Online Word CounterEnglish, Chinese, and limitsJSON FormatterJSON cleanup and path inspectionQR Code GeneratorInstant share assetsImage CompressorReduce image file sizeVideo CompressorBrowser-side video compression with presetsTime Zone ConverterGlobal schedulingMortgage CalculatorHousing estimatePassword GeneratorLocal no-storage passwordsCSV to JSON ConverterCSV to JSONPercentage CalculatorEveryday mathCompound Interest CalculatorSavings growthMarkdown PreviewDraft previewTimestamp ConverterEpoch time cleanupUnit ConverterMeasurement cleanupLoan CalculatorPayment estimateCountdown CalculatorDays until dateText CleanerWhitespace cleanupVideo Format ConverterMP4, WebM, and GIF-like browser conversionImage ResizerPixel resizingUUID GeneratorDeveloper IDs
Quick answer
AscendLab tools are free browser-side utilities grouped by practical job type.

Start here when you need calculators, converters, developer tools, image utilities, video compression, video conversion, video muting, video audio extraction, video-to-GIF conversion, video info checks, bitrate planning, subtitle conversion, video trimming, video thumbnails, content helpers, placeholder text, random pickers, week numbers, QR codes, or time planning tools.

Every live tool has its own page with controls, examples, assumptions, FAQs, and related tools.

Best inputs
Use the category map when your task is broad, and search when your task is specific.

Search by tool name, formula, file type, output format, or everyday phrase such as word counter, CSV to JSON, CSS specificity, binary to decimal, ISO week, or random name picker.

Open category pages when you want several related tools, such as finance calculators or content planning utilities.

Common use cases
The hub is built for discovery, repeat use, and moving between related utility workflows.

Find a tool quickly, compare nearby tools in the same category, or discover related calculators and converters.

Use it as the stable entry point when new browser tools are added over time.

Category map

Choose the right tool family first

Start with a category when the task is broad, then use the category page decision guide to choose the exact tool.

Image tools
26
Crop, resize, compress, convert image formats, inspect or remove metadata, rotate, flip, blur, pixelate, split, collage, create emoji mosaics, watermark, convert to Base64, pick colors, generate favicons, and prepare visual assets with browser-side processing.
Image Watermark ToolImage Crop ToolImage Resizer
View decision guide
Video tools
13
Inspect, compress, convert, trim, mute, extract audio, plan bitrate, shift subtitles, create GIFs, and capture thumbnails in the browser.
Video CompressorVideo Format ConverterVideo Mute Tool
View decision guide
Developer tools
61
Format data, convert structured text, generate identifiers, parse URLs and headers, draft SEO tags, test regex, check hashes, and handle quick browser-side developer tasks.
QR Code GeneratorBatch QR Code GeneratorBarcode Generator
View decision guide
Finance calculators
16
Estimate savings, DCA plans, mortgage and loan payments, fees, taxes, margins, break-even points, pay, tips, and everyday money math in the browser.
Discount CalculatorTip CalculatorLoan Calculator
View decision guide
Health calculators
3
Estimate BMI, calories, and sleep timing in the browser with transparent assumptions.
Sleep Cycle CalculatorBMI CalculatorCalorie Calculator
View decision guide
Time tools
13
Plan time zones, timestamps, countdowns, business days, work hours, date offsets, week numbers, time unit conversions, start-to-end durations, add/subtract duration math, playback speed, and video timelines in the browser.
Business Days CalculatorWork Hours CalculatorDate Add Calculator
View decision guide
Converters
12
Convert everyday units, number bases, Roman numerals, CSS sizing formulas, color formats, palettes, gradients, box shadows, grid and flexbox CSS, and accessibility checks in the browser.
Contrast CheckerCSS Box Shadow GeneratorCSS Gradient Generator
View decision guide
Content planning
22
Clean text, count words, preview Markdown, convert writing formats, generate slugs and tables, analyze readability, and plan publishing length with browser-side processing.
Markdown Link ExtractorURL List ExtractorEmail Extractor
View decision guide
Math helpers
9
Solve practical arithmetic, averages, weighted grades, ratios, fractions, GCD, LCM, prime factors, randomization, list shuffling, and picking workflows in the browser without a spreadsheet.
Random Number GeneratorList RandomizerAverage Calculator
View decision guide

Popular search paths

Open the tool behind the search

These common searches open the most relevant tool page directly.

crop image onlineImage Crop Tool · Image toolsOpen toolvideo compressorVideo Compressor · Video toolsOpen tooljson formatterJSON Formatter · Developer toolsOpen toolmortgage calculator with taxes and insuranceMortgage Calculator · Finance calculatorsOpen toolBMI calculatorBMI Calculator · Health calculatorsOpen tooltime duration calculatorTime Duration Calculator · Time toolsOpen toolunit converterUnit Converter · ConvertersOpen toolword counterOnline Word Counter · Content planningOpen toolpercentage calculatorPercentage Calculator · Math helpersOpen toolimage cropperImage Crop Tool · Image toolsOpen toolcompress video onlineVideo Compressor · Video toolsOpen tooljson beautifierJSON Formatter · Developer toolsOpen toolmonthly mortgage payment calculator with taxes and insuranceMortgage Calculator · Finance calculatorsOpen toolbody mass index calculatorBMI Calculator · Health calculatorsOpen tooltime between two timesTime Duration Calculator · Time toolsOpen toolmetric conversion calculatorUnit Converter · ConvertersOpen tool
How to use the tool library
Start from the path that matches the job, then narrow with search or category filters.
Design and asset prep: crop, watermark, image colors, video compression, video conversion, video muting, video audio extraction, video-to-GIF conversion, video info checks, bitrate planning, subtitle conversion, video trimming, video thumbnails, aspect ratio, CSS clamp, gradients, shadows, QR, and barcode tools.
Developer utilities: JSON, XML, HTML, CSS, YAML, CSV, CSS specificity, uptime budgets, number bases, chmod permissions, regex, cron, password checks, hashes, UUIDs, encoding, and scannable codes.
Finance planning: compound interest, DCA, mortgage, loan, margin, payment fees, VAT, hourly pay, meeting cost, discount, tip, and percentage calculators.
Math helpers: ratios, fractions, GCD, LCM, prime factors, averages, grades, random numbers, and list picking.
Time and content planning: week numbers, countdowns, business days, time zones, durations, playback speed, video runtime, placeholder text, word count, random lists, and reading time.
Why the hub is structured this way
Category pages help with broad browsing, while search helps when you already know the task.

Each tool has its own page with controls, formulas, examples, assumptions, limitations, FAQs, and related tools. Category pages group nearby tools so you can move from a broad job to the exact utility you need.

The best next step is usually to open the exact tool you need, then move through the related tools at the bottom of each page when the workflow branches.

Browser-side by default
Current free tools are designed to run in the browser so common utility work stays quick and low-friction.
Export-ready outputs
Scannable assets and image utilities focus on outputs you can actually use in decks, docs, labels, and packaging.
Small tools, real jobs
The library prioritizes practical workflows like watermarking, video compression, video conversion, video clips, video covers, scannable codes, and time planning instead of filler widgets.

AI workflow previews

What expands the library next

Coming soon
PDF Extract
Extract markdown-ready text and useful document details from PDFs for review, search, and reuse.
Best for document parsing workflowsLearn more
Private preview
AI Video Translation
Plan multilingual subtitle and optional audio workflows for product demos, tutorials, and campaign media.
Best for fast multilingual launchesLearn more
Private preview
AI Image Translation
Plan reviewable image localization workflows for creative assets, translated text, and layout intent.
Best for localization design teamsLearn more
Integration path
API Delivery
Connect document or translation workflows to your product process with authenticated API access and usage controls.
Best for platform integrationLearn more
Frequently asked questions

Should I start from the homepage or from /tools?

If you already know you want a utility, /tools is the better starting point. The homepage still tells the broader product story, while the tools library is optimized for direct discovery.

How are tools grouped?

Tools are grouped by job type: image tools, video tools, developer tools, finance calculators, health calculators, time tools, converters, content planning, and math or randomization helpers.

Which tools are best for developers and designers?

UUID Generator, Unix Permission Calculator, CSS Specificity Calculator, Number Base Converter, CSS Unit Converter, CSS Clamp Generator, Color Converter, Image Color Picker, QR Code Generator, and Barcode Generator are strong fits for development, design, and production workflows.

Will more tools be added here over time?

Yes. This page is the main place to find all free browser tools, including new additions and popular utilities.

Free Browser Tools by Category | AscendLab