Tooloolis682

Tools that tell the truth.
682+ honest browser tools, no signup.

682+ honest tools, browser-native. Decision composites · longevity scoring · DACH calculators · live browser-API tools. No login, no upload, no tracking. Each tool answers one question well.

Toololis is a curated directory of small, single-purpose web tools. Every tool runs in your browser — no upload, no account, no tracking script following you afterwards. 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.

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Browse 682+ tools → How it works
682
// Tools live
0
// Trackers
9
// Languages
100%
// Browser-native
MIT
// Open source
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AI

78 tools · all client-side

AI Team Cost Calculator

Estimate monthly AI API costs for teams of any size

Open

EU AI Act Risk Classifier

Classify your AI system — Prohibited, High, Limited, Minimal risk

Open

AI Budget Burn Predictor

Predict when your API budget runs out — month by month

Open

AI vs Human Cost Calculator

Is AI or a human cheaper for this task?

Open

Prompt Cache ROI Calculator

Anthropic caching — calculate real cost savings

Open

LLM Consistency Tester

Paste N outputs — measure variance, similarity, stability

Open

RAG vs Long-Context Calculator

When is RAG cheaper than stuffing context?

Open

Batch API Discount Calculator

Is 50% off worth 24h delay?

Open

Embedding Cost Calculator

Vector DB + embedding cost across providers

Open

Fine-tune vs Prompting ROI

When does fine-tuning pay off?

Open

Model Benchmark Picker

Which LLM wins for your task?

Open

Prompt Injection Scanner

Scan user input for jailbreak patterns

Open

Hallucination Severity Scorer

Not just yes/no — how bad is this hallucination?

Open

AI Model Card Generator

Standardized disclosure doc for your AI system

Open

GDPR for LLMs Compliance Checker

Is your LLM setup GDPR-compliant?

Open

Semantic Similarity Calculator

Cosine, Jaccard, Levenshtein between any 2 texts

Open

Token Budget Allocator

Split max_tokens across system / user / output

Open

Context Window Optimizer

Trim long documents to fit context window

Open
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SEO & Web

57 tools · all client-side

Meta Title + Description Scanner

SEO audit for your <head> tags

Open

Schema.org JSON-LD Validator

Validate structured data before deploy

Open

Internal Link Analyzer

Count + analyze links in HTML

Open

Broken Link Pattern Finder

Detect likely-broken URLs in your content

Open

Heading Hierarchy Scanner

H1-H6 structure audit

Open

Image Alt-Text Coverage Scanner

Find images missing alt text

Open

Canonical + Hreflang Checker

International SEO tag audit

Open

Sitemap XML Validator

Validate sitemap.xml structure

Open

Robots.txt Analyzer

Audit your robots.txt for issues

Open

AEO (Answer Engine Optimization) Scorer

Score content for AI search visibility

Open

GEO (Generative Engine Optimization)

Score content for LLM citations

Open

Content Originality Scanner

Check for AI-sounding / generic content

Open

Core Web Vitals JSON Analyzer

Parse Lighthouse output for CWV scores

Open

Bundle Size Analyzer

Budget your JS bundle size

Open

Cache Header Inspector

Audit Cache-Control + ETag strategy

Open

Image Optimization Scanner

Find optimization opportunities in HTML

Open

Font Loading Analyzer

Audit @font-face + font loading strategy

Open

CDN Detector

Which CDN is this site using?

Open
🛒

E-Commerce

19 tools · all client-side

Amazon FBA Profit Calculator

Real margin after every fee — referral, FBA, storage, ads

Open

Amazon Listing SEO Score

Title + bullets + description quality scored

Open

Amazon BSR Decay Predictor

How fast does your Best Seller Rank slip?

Open

Amazon Buy-Box Win Probability

Will you win the Buy Box? Multi-factor predictor

Open

Amazon PPC ACoS Calculator

Bid, ACoS, ROAS, break-even bid in one screen

Open

Amazon Listing vs Competitor

Paste 2 listings — see the gap

Open

Amazon Variation Theme Optimizer

Parent/child structure that converts

Open

Amazon Listing Image Compliance

Background, resolution, ratio — 12-rule check

Open

Amazon Listing Hijacker Risk Score

How vulnerable is your listing to hijack?

Open

Amazon Review Authenticity Score

Heuristic detector for fake review patterns

Open

Etsy 13-Tag SEO Optimizer

Use all 13 tags strategically — long-tail wins

Open

Etsy Listing Quality Score

All hidden quality factors — title, photos, tags, price

Open

Etsy Listing Renewal ROI

Is the $0.20 auto-renew actually worth it?

Open

Etsy Star Seller Probability

5★ rating + <24h reply + on-time + $1K sales

Open

Etsy Niche Saturation Score

Is your niche already crowded? Total/competition ratio

Open

Etsy Ads vs Organic Break-Even

When does Etsy Ads break even — or actually print money?

Open

Amazon FBA Fee Calculator

Calculate FBA fees, profit margins & break-even price

Open

Etsy Listing SEO Scorer

Score your Etsy listing for SEO — title, tags & description

Open
💰

Finance

108 tools · all client-side

Percentage Calculator

Calculate percentages, increases, decreases & more

Open

Loan Calculator

Monthly payments, total interest & amortization

Open

Currency Converter

Live exchange rates for 170+ currencies

Open

Paycheck Calculator

Net salary after taxes — Germany, USA, UK

Open

Crypto Tax Calculator

Calculate crypto capital gains — FIFO or LIFO

Open

Mortgage Stress Test

Can you still afford your mortgage if rates rise?

Open

Decision Matrix

Weighted pros/cons for hard decisions

Open

Gross Margin Calculator

Revenue minus COGS over Revenue — business margin

Open

CAGR Calculator

Compound Annual Growth Rate — investments and revenue

Open

Mortgage Refinance Breakeven

When does refinance pay back?

Open

FIRE Calculator (Lean / Fat / Coast / Barista)

Modern FIRE math — 4 variants compared

Open

Currency Real Cost (Wise vs Revolut vs Bank)

Compare real fees, not just rates

Open

Salary True Total Compensation

Equity + benefits + PTO as € value

Open

Mortgage Stress Test 2026

What if rates rise to 8%?

Open

Real Inflation-Adjusted Calculator

$10K in 1990 = ? today

Open

Subscription Audit Stack

List all subs → find waste → save €

Open

True Cost of Car Ownership

Way more than monthly payment

Open

Cashback Multi-Card Optimizer

Best card per category — auto-routed

Open
📱

Social

28 tools · all client-side

TikTok Hook Score

First 3 seconds → retention prediction

Open

TikTok Hashtag Reach Estimator

Optimal #tag mix for max reach

Open

TikTok Post Time Optimizer

Best time to post for your niche + timezone

Open

TikTok Sound Viral Predictor

Is this sound on the hockey stick?

Open

TikTok Caption Optimizer

Length, CTA, hashtags — score your caption

Open

TikTok Shadowban Checker

8-point diagnostic for suppressed accounts

Open

YouTube Thumbnail CTR Predictor

Score your thumbnail for click-through rate

Open

YouTube Title SEO Scorer

Title length, keywords, emotional triggers

Open

YouTube Description Analyzer

Keyword density, CTA, timestamps

Open

YouTube Tag Generator

Generate 20+ relevant tags from a topic

Open

YouTube Video Length Optimizer

Optimal duration for your niche + video type

Open

YouTube Channel Growth Predictor

Current subs + upload rate → 12-month projection

Open

YouTube Chapter Scorer

Click-worthy timestamps, length variance

Open

Instagram Reel Hook Analyzer

First seconds + caption + cover score

Open

Instagram Hashtag Cluster Builder

30 optimally mixed tags for your niche

Open

X (Twitter) Tweet Scorer

Engagement + virality prediction

Open

X Thread Hook Optimizer

First tweet → view multiplier score

Open

LinkedIn Post Impression Predictor

Length, formatting, hooks — estimate reach

Open
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Calculator

238 tools · all client-side

Age Calculator

Calculate exact age in years, months, days, hours

Open

BMI Calculator

Body Mass Index — metric and imperial

Open

Tip Calculator

Calculate tips and split bills between people

Open

Temperature Converter

Celsius ↔ Fahrenheit ↔ Kelvin — instant

Open

Length Converter

Meters, feet, inches, kilometers, miles and more

Open

Weight Converter

Kilograms ↔ pounds ↔ ounces ↔ grams

Open

Countdown Timer

Count down to any date or time — live

Open

Calorie Calculator (TDEE)

Daily calorie needs using Mifflin-St Jeor formula

Open

Compound Interest Calculator

See how money grows over time — with monthly contributions

Open

Solar Panel ROI Calculator

Payback period + lifetime savings of solar panels

Open

EV vs Gas Cost Calculator

Compare 5-year total cost: electric vs gasoline car

Open

Carbon Footprint Calculator

Estimate your annual CO2 emissions

Open

Intermittent Fasting Timer

Track 16:8, 18:6, OMAD, 5:2 — all protocols

Open

Macro Calculator

Protein, carbs, fat for your fitness goal

Open

A/B Test Significance Calculator

Is your A/B test result statistically significant?

Open

Timezone Meeting Finder

Find a time that works for global teams

Open

Schengen 90/180 Calculator

Track Schengen Area stays for digital nomads

Open

Scientific Calculator

Full scientific calculator — trig, log, exp, memory

Open
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Developer

45 tools · all client-side

JSON Formatter

Format, validate & minify JSON in your browser

Open

Regex Tester

Test regular expressions in real-time

Open

Base64 Encoder / Decoder

Encode or decode Base64 instantly

Open

JWT Decoder

Decode JSON Web Tokens — 100% client-side

Open

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes

Open

URL Encoder / Decoder

Encode or decode URL-safe strings instantly

Open

UUID Generator

Generate v4 UUIDs — cryptographically random

Open

Unix Timestamp Converter

Convert between Unix timestamps and human dates

Open

Color Picker & Converter

Pick colors and convert HEX ↔ RGB ↔ HSL

Open

Markdown Editor

Write Markdown with live HTML preview

Open

SQL Formatter

Format and beautify SQL queries

Open

CSS Gradient Generator

Design linear and radial CSS gradients visually

Open

AI Text Detector

Detect AI-generated text with rule-based heuristics

Open

AI Token Counter

Count tokens for GPT-4, Claude, Gemini — with cost estimates

Open

Tiktoken Visualizer

See your text tokenized — colorful, instant, for GPT/Claude/Gemini

Open

Multi-Model AI Comparator

Compare GPT-4, Claude, Gemini — tokens + costs side-by-side

Open

PII Scrubber

Remove personal info before sending text to AI

Open

API Key Leak Detector

Scan text or files for leaked API keys — 20+ providers

Open
📝

Text

21 tools · all client-side

Word Counter

Count words, characters, sentences & reading time instantly

Open

Case Converter

UPPERCASE, lowercase, Title Case, camelCase & more

Open

Password Generator

Strong, random passwords — generated in your browser

Open

Lorem Ipsum Generator

Placeholder text in words, sentences or paragraphs

Open

Text Diff Checker

Compare two texts and highlight the differences

Open

Reverse Text

Reverse characters, words, or flip lines upside-down

Open

URL Slug Generator

Convert titles to SEO-friendly URL slugs

Open

AI Output Humanizer

Make AI-written text sound more human — rule-based, instant

Open

Prompt Enhancer

Transform basic prompts into structured, high-quality prompts

Open

Prompt Library

60+ curated AI prompt templates — ready to copy

Open

AI Resume Builder

Build a professional resume in minutes — download as PDF

Open

Email Signature Generator

Create beautiful HTML email signatures in seconds

Open

AI Paraphrasing Tool

Rewrite text in 5 different styles — instant & private

Open

Grammar Checker

Check grammar, spelling & readability — free Grammarly alternative

Open

Plagiarism Checker

Detect duplicate content with text fingerprinting

Open

AI Presentation Maker

Turn markdown into beautiful slide decks — export HTML & PDF

Open

AI Writing Humanizer

Make AI-generated text sound natural and human

Open

Emoji Picker

Browse & copy emojis — search 1800+ emojis by name or category

Open
🖼️

Image

18 tools · all client-side

QR Code Generator

Create QR codes for URLs, text, WiFi or anything

Open

Image Compressor

Reduce image file size without losing quality

Open

Image Resizer

Resize images by pixels or percentage

Open

Image Format Converter

Convert between JPG, PNG, WebP, AVIF

Open

Image Cropper

Crop images to any aspect ratio

Open

Background Remover

Remove image backgrounds instantly — 100% in your browser

Open

AI Image Upscaler

Upscale images 2× or 4× with AI enhancement

Open

Video Compressor

Compress videos up to 90% smaller — right in your browser

Open

AI Logo Generator

Generate unique logos from templates — download SVG & PNG

Open

Brand Identity Generator

Generate color palette, typography & social kit from a brand name

Open

Image All-in-One

Compress, resize, convert, crop & watermark in one tool

Open

Color Palette from Image

Extract dominant colors from any image — get hex, RGB & HSL

Open

Image to Text (OCR)

Extract text from images — supports screenshots, photos & scanned docs

Open

Photo Editor

Edit photos in your browser — crop, resize, filters, adjust & draw

Open

Meme Generator

Create memes with custom text — classic templates or upload your own

Open

Video to GIF

Convert video clips to animated GIFs — trim, resize & optimize

Open

GIF Maker

Create animated GIFs from images — set speed, size & loop

Open

Photo Collage Maker

Create photo collages — grids, layouts & custom arrangements

Open
📄

PDF

8 tools · all client-side

PDF Merger

Combine multiple PDFs into one file

Open

PDF Compressor

Reduce PDF file size while keeping quality

Open

PDF Splitter

Extract pages or split PDF into parts

Open

JPG to PDF

Convert one or many images into a single PDF

Open

PDF to JPG

Extract every page as a JPG image

Open

PDF to Word Converter

Convert PDF files to editable Word documents

Open

Word to PDF Converter

Convert Word documents to PDF instantly

Open

PDF Editor

Edit PDFs in your browser — add text, highlight, sign & annotate

Open
🎵

Audio

10 tools · all client-side

Text to Speech

Convert text to natural speech — 50+ voices, download as audio

Open

Speech to Text

Transcribe speech to text in real time — supports 40+ languages

Open

Audio Recorder

Record audio from your microphone — download as WAV or WebM

Open

Audio Trimmer

Trim and cut audio files — visual waveform editor

Open

Audio Converter

Convert audio between MP3, WAV, OGG & more formats

Open

Voice Changer

Record or upload audio and apply fun voice effects

Open

Audio Joiner

Merge multiple audio files into one — drag to reorder

Open

Noise Remover

Reduce background noise from audio recordings

Open

Online Metronome

Precise BPM metronome with tap tempo and time signatures

Open

Tone Generator

Generate precise audio frequencies — sine, square, sawtooth waves

Open
52 deutsche Tools — Bußgeld, Elterngeld, Steuer & mehr
Specialized tools for German residents (DACH-region only)
🔒
Private
Runs entirely in your browser
⚡
Instant
No upload, no wait, no signup
♾️
Unlimited
No limits, no watermarks, ever
📱
Works offline
Install as PWA for one-tap access

Built different.

682+ tools, one rule: your data never leaves your device.

  1. 1
    Search with / or browse categories
  2. 2
    Open — every tool loads instantly
  3. 3
    Done — copy, download, share

All categories

🧮
Calculator100+
 💻
Developer80+
 🖼️
Image60+
 📝
Text50+
 🤖
AI40+
 📄
PDF30+
 🔍
SEO & Web40+
 💰
Finance90+
 📲
Social25+
 🛒
E-Commerce18+
 🇩🇪
DACH45 DE-Tools

Questions

What is Toololis?
Toololis is a collection of 682+ free utility tools — PDF, image, developer, calculator, and text tools. Every tool runs entirely in your browser.
Are these tools really free?
100% free with no usage limits, no watermarks, no account, no paywall. Supported by non-intrusive display advertising.
Do I need to upload my files?
No. Every tool runs in your browser. Your files, text, and data stay on your device.
How many tools does Toololis have?
682+ tools across 5 categories: PDF, Image, Developer, Calculator, and Text. 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.