Tools that tell the truth.
691+ honest browser tools. No signup. Your files stay on your device.
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Common tasks
- Merge PDFs Combine several PDFs into one file.
- Compress a PDF Lossless clean-up. Scans and photo PDFs may barely shrink.
- Compress images Re-encode photos as JPG or WebP at a quality you pick.
- Images to PDF Turn one or many images into a single PDF.
- Format JSON Format, validate and minify JSON in your browser.
- Count words Words, characters, sentences and reading time.
- Make a QR code QR codes for links, text or WiFi. Download as PNG.
- Make a password Random passwords from your browser's secure generator.
8 tools
- PDF SplitterExtract pages or split PDF into parts
- PDF to JPGExtract every page as a JPG image
- PDF to Word ConverterConvert PDF files to editable Word documents
- Word to PDF ConverterConvert Word documents to PDF instantly
- PDF EditorEdit PDFs in your browser — add text, highlight, sign & annotate
- PDF MergerCombine multiple PDFs into one file
- PDF CompressorClean up and slim down PDFs without recompressing images (scans may barely shrink)
- JPG to PDFConvert one or many images into a single PDF
Image
19 tools
- Image ResizerResize images by pixels or percentage
- Image Format ConverterConvert between JPG, PNG, WebP, AVIF
- Image CropperCrop images to any aspect ratio
- Background RemoverRemove image backgrounds instantly — 100% in your browser
- AI Image UpscalerEnlarge images 2×, 3× or 4× with smoothing and sharpening (no AI model)
- Video CompressorCompress videos up to 90% smaller — right in your browser
- AI Logo GeneratorGenerate unique logos from templates — download SVG & PNG
- Brand Identity GeneratorGenerate color palette, typography & social kit from a brand name
- Image All-in-OneCompress, resize, convert, crop & watermark in one tool
- Color Palette from ImageExtract dominant colors from any image — get hex, RGB & HSL
- Image to Text (OCR)Extract text from images — supports screenshots, photos & scanned docs
- Photo EditorEdit photos in your browser — crop, resize, filters, adjust & draw
Developer
46 tools
- Regex TesterTest regular expressions in real-time
- Base64 Encoder / DecoderEncode or decode Base64 instantly
- JWT DecoderDecode JSON Web Tokens — 100% client-side
- Hash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-512 hashes
- URL Encoder / DecoderEncode or decode URL-safe strings instantly
- UUID GeneratorGenerate v4 UUIDs — cryptographically random
- Unix Timestamp ConverterConvert between Unix timestamps and human dates
- Color Picker & ConverterPick colors and convert HEX ↔ RGB ↔ HSL
- Markdown EditorWrite Markdown with live HTML preview
- SQL FormatterFormat and beautify SQL queries
- CSS Gradient GeneratorDesign linear and radial CSS gradients visually
- AI Text DetectorDetect AI-generated text with rule-based heuristics
Text
22 tools
- Case ConverterUPPERCASE, lowercase, Title Case, camelCase & more
- Lorem Ipsum GeneratorPlaceholder text in words, sentences or paragraphs
- Text Diff CheckerCompare two texts and highlight the differences
- Reverse TextReverse characters, words, or flip lines upside-down
- URL Slug GeneratorConvert titles to SEO-friendly URL slugs
- AI Output HumanizerMake AI-written text sound more human — rule-based, instant
- Prompt EnhancerTransform basic prompts into structured, high-quality prompts
- Prompt Library60+ curated AI prompt templates — ready to copy
- AI Resume BuilderBuild a professional resume in minutes — download as PDF
- Email Signature GeneratorCreate beautiful HTML email signatures in seconds
- AI Paraphrasing ToolRewrite text in 5 different styles — instant & private
- Grammar CheckerCheck grammar, spelling & readability — free Grammarly alternative
Calculator
244 tools
- Age CalculatorCalculate exact age in years, months, days, hours
- BMI CalculatorBody Mass Index — metric and imperial
- Tip CalculatorCalculate tips and split bills between people
- Temperature ConverterCelsius ↔ Fahrenheit ↔ Kelvin — instant
- Length ConverterMeters, feet, inches, kilometers, miles and more
- Weight ConverterKilograms ↔ pounds ↔ ounces ↔ grams
- Countdown TimerCount down to any date or time — live
- Calorie Calculator (TDEE)Daily calorie needs using Mifflin-St Jeor formula
- Compound Interest CalculatorSee how money grows over time — with monthly contributions
- Solar Panel ROI CalculatorPayback period + lifetime savings of solar panels
- EV vs Gas Cost CalculatorCompare 5-year total cost: electric vs gasoline car
- Carbon Footprint CalculatorEstimate your annual CO2 emissions
Decision tools
Scores that weigh several inputs at once: decision support, not advice.
- Longevity Protocol Composite Score Multi-biomarker readiness — 0-100
- Where Do I Stand? — Life Composite Combine all self-tests into one big-picture score
- Biological Age Clock Phenotypic-age vs chrono-age — Levine 2018 formula
- Should I Quit My Job Today? Composite score: burnout + savings + market + pivot cost
- Coffee Lifetime Cost — Truth Career years × cups × opportunity cost
- EU AI Act Risk Classifier Classify your AI system — Prohibited, High, Limited, Minimal risk
Finance
108 tools
- Percentage CalculatorCalculate percentages, increases, decreases & more
- Loan CalculatorMonthly payments, total interest & amortization
- Currency ConverterConvert between 47 major currencies using daily exchange rates
- Paycheck CalculatorNet salary after taxes — Germany, USA, UK
- Crypto Tax CalculatorCalculate crypto capital gains — FIFO or LIFO
- Mortgage Stress TestCan you still afford your mortgage if rates rise?
- Decision MatrixWeighted pros/cons for hard decisions
- Gross Margin CalculatorRevenue minus COGS over Revenue — business margin
- CAGR CalculatorCompound Annual Growth Rate — investments and revenue
- Mortgage Refinance BreakevenWhen does refinance pay back?
- FIRE Calculator (Lean / Fat / Coast / Barista)Modern FIRE math — 4 variants compared
- Currency Real Cost (Wise vs Revolut vs Bank)Compare real fees, not just rates
AI
78 tools
- AI Team Cost CalculatorEstimate monthly AI API costs for teams of any size
- EU AI Act Risk ClassifierClassify your AI system — Prohibited, High, Limited, Minimal risk
- AI Budget Burn PredictorPredict when your API budget runs out — month by month
- AI vs Human Cost CalculatorIs AI or a human cheaper for this task?
- Prompt Cache ROI CalculatorAnthropic caching — calculate real cost savings
- LLM Consistency TesterPaste N outputs — measure variance, similarity, stability
- RAG vs Long-Context CalculatorWhen is RAG cheaper than stuffing context?
- Batch API Discount CalculatorIs 50% off worth 24h delay?
- Embedding Cost CalculatorVector DB + embedding cost across providers
- Fine-tune vs Prompting ROIWhen does fine-tuning pay off?
- Model Benchmark PickerWhich LLM wins for your task?
- Prompt Injection ScannerScan user input for jailbreak patterns
SEO & Web
57 tools
- Meta Title + Description ScannerSEO audit for your <head> tags
- Schema.org JSON-LD ValidatorValidate structured data before deploy
- Internal Link AnalyzerCount + analyze links in HTML
- Broken Link Pattern FinderDetect likely-broken URLs in your content
- Heading Hierarchy ScannerH1-H6 structure audit
- Image Alt-Text Coverage ScannerFind images missing alt text
- Canonical + Hreflang CheckerInternational SEO tag audit
- Sitemap XML ValidatorValidate sitemap.xml structure
- Robots.txt AnalyzerAudit your robots.txt for issues
- AEO (Answer Engine Optimization) ScorerScore content for AI search visibility
- GEO (Generative Engine Optimization)Score content for LLM citations
- Content Originality ScannerCheck for AI-sounding / generic content
E-Commerce
19 tools
- Amazon FBA Profit CalculatorReal margin after every fee — referral, FBA, storage, ads
- Amazon Listing SEO ScoreTitle + bullets + description quality scored
- Amazon BSR Decay PredictorHow fast does your Best Seller Rank slip?
- Amazon Buy-Box Win ProbabilityWill you win the Buy Box? Multi-factor predictor
- Amazon PPC ACoS CalculatorBid, ACoS, ROAS, break-even bid in one screen
- Amazon Listing vs CompetitorPaste 2 listings — see the gap
- Amazon Variation Theme OptimizerParent/child structure that converts
- Amazon Listing Image ComplianceBackground, resolution, ratio — 12-rule check
- Amazon Listing Hijacker Risk ScoreHow vulnerable is your listing to hijack?
- Amazon Review Authenticity ScoreHeuristic detector for fake review patterns
- Etsy 13-Tag SEO OptimizerUse all 13 tags strategically — long-tail wins
- Etsy Listing Quality ScoreAll hidden quality factors — title, photos, tags, price
Audio
10 tools
- Text to SpeechRead text aloud with the voices your browser provides
- Speech to TextTranscribe speech to text in real time — supports 40+ languages
- Audio RecorderRecord audio from your microphone — download as WAV or WebM
- Audio TrimmerTrim and cut audio files — visual waveform editor
- Audio ConverterConvert audio between MP3, WAV, OGG & more formats
- Voice ChangerRecord or upload audio and apply fun voice effects
- Audio JoinerMerge multiple audio files into one — drag to reorder
- Noise RemoverReduce background noise from audio recordings
- Online MetronomePrecise BPM metronome with tap tempo and time signatures
- Tone GeneratorGenerate precise audio frequencies — sine, square, sawtooth waves
Built different.
691+ tools, one rule: your files never leave your device.
Toololis is a curated directory of small, single-purpose web tools. Nearly every tool runs in your browser — no upload, no account. A few have to contact an outside service: exchange rates, DNS and IP lookups, speed tests, site audits, password breach checks, and speech to text (which uses your browser's speech service). Visits are counted with Google Analytics 4 (GA4 sets a cookie). It is not sent your files or what you type, apart from tools that put their settings in the page address. Some are utilities you'd expect (word counter, JSON formatter, BPM detector); others are decision composites you won't find anywhere else: the Longevity Protocol Composite Score, the "Should I quit my job today?" score, the EU AI Act risk classifier. Built solo over 9 months, MIT-licensed on GitHub, and updated weekly. The promise is in the name — these tools tell you the truth, even when the truth is inconvenient.
- Search with / or browse categories.
- Open — every tool loads instantly.
- Done — copy, download, share.
Questions
What is Toololis?
Toololis is a collection of 691+ free utility tools — PDF, image, developer, calculator, and text tools. Nearly every tool runs in your browser.
Are these tools really free?
100% free with no usage limits, no watermarks, no account, no paywall. There are currently no ads.
Do I need to upload my files?
No. File tools process your files in your browser and never upload them. A few lookup tools, such as exchange rates and DNS, contact an outside service.
How many tools does Toololis have?
691+ tools across 11 categories: PDF, Image, Developer, Text, Calculator, Finance, AI, SEO & Web, Social, E-Commerce and Audio. New tools are added regularly.
Do the tools work on mobile?
Yes — built mobile-first. Works on phones, tablets, and desktop. Install as a PWA for one-tap access.
Is Toololis open source?
Source is on GitHub. Uses pdf-lib, pdfjs-dist, qrcode, diff, js-md5 under MIT/Apache licenses.
Social
28 tools