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| free tools |
| for devs |
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Built for you.
Kept free on purpose.
Everything on this site is completely free — no ads, no paywalls, no "free tier" that cuts off after 3 uses. Just tools that work. If one of them saved you 10 minutes, consider buying a coffee. ☕
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a note from jasper
I build these tools in my spare time because I kept running into the same frustration: the best tools online are either paywalled after a few uses, covered in ads, or require an account just to merge two PDFs. That's annoying. So I built my own.
Everything here runs 100% in your browser — your files never touch a server, there's no tracking beyond basic privacy-first analytics, and nothing is ever going behind a paywall.
If something here saved you time or frustration, a coffee means a lot. It's what keeps the domain paid, the ideas coming, and the tools improving.
— Jasper, Belgium 🇧🇪
what your coffee keeps free
🌬️European Air Quality & Climate Anomalies ViewerLive European AQI, PM2.5, NO₂ & O₃ from Copernicus CAMS + temperature anomalies vs the 1991–2020 normal — click anywhere for details
🔥Europe Wildfire Map — Live Forest Fire TrackerLive forest fires across Europe from NASA VIIRS & MODIS satellites and EFFIS burnt areas — fires per country, fire-power chart, wind & smoke per fire, 24h/48h/7-day
💧Europe Groundwater Map — EU Aquifer Status TrackerOfficial EU status of 12,000+ groundwater bodies from EEA/WISE data — chemical & quantitative, click any aquifer to inspect
🌧️Buienradar — Live Rain Radar & ForecastWill it rain in the next 2 hours? Live radar, dry-window planner, rain alert and 7-day forecast
🧒Kids Weekly Planner — Visual ScheduleBig icon-based weekly schedule for young children — school, daycare, outside play, TV time & hobbies. Fullscreen display mode, lockable for safe viewing
🌊Tide TableTide times for 500 ports — coefficient, low tide planner, calendar export
🌅Golden Hour CalculatorExact golden & blue hour windows, plus sunrise, sunset, every twilight tier and day length for any city — NOAA algorithm, runs in your browser
✨Tonight's Sky — Live Star Map900+ stars, all 88 constellations, real-time planet & Moon positions for your location, computed in your browser
🌙Bedtime Story GeneratorYour child as the hero — calm personalised stories in 6 worlds, read aloud softly, rain or waves after. English & Dutch
🏆World Cup Screensaver — Waving FlagsSupport your country — its flag waves fullscreen with confetti, the teams playing & an editable scoreboard. 24+ nations, no download
🧺Tidy-Up Hero — Kids Clean-Up GameMake cleaning up a game for toddlers — tap each toy into the basket, fill the stars and win a sticker
🎂Birthday CountdownMake a shareable countdown to anyone's birthday — 10 animated themes, sound effects, QR sharing and a confetti finale
🏠Homescreen — Speed Dial Start PagePin favorite site icons, categories, bang search & local weather. Cached in your browser, export/import as JSON
🎭Backstage Stage Clock — Green Room CountdownShare one link and every backstage screen shows the same set times, time-left countdown, changeover clock and next-up warning. No account, no server, no device limit
🌍World Clock Wall — 4–9 Time ZonesLive local time for 4–9 cities on one fullscreen screen — real sunrise/sunset skies, who’s working, digital or analog. Built for remote teams to keep open all day
🙋Volunteer Shift Timer & Attendance BoardTap-in attendance board for clubhouses — who's present, who's next, live shift countdown, weekly schedule, CSV export
🔦Ultimate Flashlight ToolkitScreen flashlight with 23 modes — white, strobe, SOS, police, disco. No camera access, 100% private
🛸Pentagon UFO Files 2026All six PURSUE releases explained — Apollo records, AC-130J footage, AAWSAP papers & where to read the originals
🤖AI Text DetectorDetect ChatGPT, Claude & AI writing — 8 heuristic signals, phrase highlights
📄PDF ToolkitMerge, split, compress, convert — unlimited, no watermark
🌍Translator100+ languages, auto-detect, TTS, history, shareable links
📄PDF TranslatorTranslate any PDF to 100+ languages — no upload, 100% private
🟩Matrix ScreensaverFullscreen Matrix digital rain in your browser — no download, fully customizable
🦠Conway's Game of LifeFullscreen Game of Life cellular automaton — 6 patterns, click to draw, no download
🌋Lava Lamp ScreensaverFullscreen retro lava lamp — morphing metaball blobs, custom colors, no download
🪝Webhook TesterCapture HTTP requests, inspect headers & body, copy as cURL
🚀API TesterSend GET, POST, PUT, DELETE requests with headers, JSON body & auth — free Postman alternative
🛡️Digital SanitizationAudit your digital footprint, kill integrations, protect your online identity
📨Message Header AnalyserSPF/DKIM/DMARC with real alignment analysis, ARC chain, hop delays and 25+ spoofing checks — nothing uploaded
🛡️DMARC / SPF / DKIM BuilderGenerate valid DMARC, SPF & DKIM DNS records — visual editor, provider presets, syntax validation
🌐Network ToolsWhat’s my IP & IPv6, WebRTC leak test, speed with packet loss, DNS + DNSSEC, SPF/DMARC audit, WHOIS and blacklist checks
💼Netto Loon VergelijkerMediaan loon · sector · Groeipakket · firmawagen — Statistiek Vlaanderen & Statbel 2024
🤖Whisper Local Scribe100% offline audio-to-text — OpenAI Whisper via WebGPU. No upload, SRT export
🎧Audio EditorCut, trim, fade, normalize & export audio — 100% in-browser
📻Web Radio PlayerYour own internet radio list — tags, favourites, and a check that finds dead stations
🎵MP3 PlayerTakes its colours from your album art — waveform seek, 10-band EQ, 6 fullscreen visualisers
🔊Online Decibel Meter — Sound Level MeterReal IEC 61672 A/C weighting, LAeq, LAFmax, LCpeak and L10/L50/L90, calibration and CSV export — audio never leaves your device
🎶Music Visualizer — GPU Light Show16 GPU scenes that react to your mic, a browser tab or your files — Auto-DJ on the drop, BPM, pop-out window and recording. 100% private
🎨ASCII Art GeneratorConvert any image to ASCII art — no upload, 100% in-browser
📷Image to ASCII ConverterPhoto to ASCII art — Braille, colour, sketch & Matrix looks, PNG, text & Discord export
📡ASCII WebcamLive webcam to ASCII art — full colour, Braille HD, sketch, Matrix rain & video recording
😂Meme Generator22 templates, drag-anywhere text, stickers & GIF captions — no watermark, no sign-up, no upload
📋Private PastebinSave code snippets and notes privately in your browser — no account, no server, no tracking. Tags, search and JSON export
📝Online NotepadSyntax highlighting, multi-tab, import & export files
📊Chart MakerBar, line, pie & donut charts — paste from Excel, up to 6 series, PNG & true SVG
💼LinkedIn Bold Text Generator14 Unicode styles for LinkedIn posts, real “…more” preview, post checklist, Docs/Markdown paste & drafts
🧹Text CleanerNames every hidden character before removing it — em dashes, zero-width, Word & PDF artefacts, Markdown
🔐Password GeneratorPasswords & passphrases with an honest crack-time estimate — nothing sent anywhere
🔴CVE ExplorerReal-time CVE search — NVD + CISA KEV + EPSS priority quadrant
📍Maps Location ImporterPaste locations → Google Maps, Apple Maps & Waze links, routes and My Maps files
🔲QR Code GeneratorWiFi, vCard & link QR codes — logo, SVG, bulk, tested to scan
🖼Free HEIC to JPG ConverterConvert iPhone HEIC photos to JPG — no upload, works on Windows & Android
🔢LLM Token Counter & CostExact GPT tokens (tiktoken) + Claude/Gemini estimates, context window & API cost
🎨HTML Colour FinderAll 148 CSS named colours — HEX, RGB, HSL, OKLCH & text contrast
🔤IT Jargon TranslatorCorporate tech speak ↔ plain English — 200+ terms
⏱Cron ExplainerWrite a schedule in plain English or read one back — next runs in your timezone, 8 dialects plus systemd timers, paste-ready snippets and a crontab audit
🔗OG Image PreviewerPreview social share cards for Twitter, LinkedIn, Facebook
🌐Favicon GeneratorAll favicon sizes from one image, with ready-to-paste HTML
💱Currency ConverterLive rates for 150+ currencies — favorites, charts, crypto. No login
🤖robots.txt GeneratorVisual builder for robots.txt — 27 bots, live preview
📅Days Between DatesExact days, business days, countdowns & date math
☁️Azure Naming ConventionCAF Azure resource names — 200+ types, validator, Terraform, Bicep & Policy export
🪑Seating Chart MakerDrag & drop guests to tables — weddings, events & classrooms
🏆Certificate Maker6 templates, custom text & colours, download PDF or print — no watermark
✉️Email Signature BuilderOutlook-safe HTML signatures — 10 templates, copy & paste, no signup
🎯Bingo Card GeneratorCustom bingo cards for meetings, classrooms or parties — print or share
🪄The EraserScrub PII from documents — names, dates, IDs & BSN numbers automatically
✍️PDF Form FillerFill in any PDF — text, checkmarks, dates & hand-drawn signatures, no upload, export instantly
⬛PDF RedactorSearch, scan and black out a PDF — text, images and metadata removed for real, then verified after saving
🎯Lead FinderGenerate targeted B2B lead lists by role, industry & company size — export CSV instantly
🗄️Fake Data Generator50,000 rows of realistic test data — 18 industry schemas, joinable related tables, a CSV anonymiser and the schema as SQL, Zod or Faker code
🔑Env File EditorEdit, validate & fix .env files with one click — secret scan, Node/Python/Docker compatibility, 40 export formats
🔀JSON Diff ViewerCompare two JSON objects side by side — see additions, removals & changes in a collapsible tree
🔣Regex TesterLive regex editor with match highlighting, capture groups, cheat sheet & common pattern library
📝Diff CheckerCompare text, code, Word, PDF, CSV, JSON & images — syntax highlighting, redline, merge builder, no paywall
📦Open ZIP File OnlineOpen any .zip online — browse file tree, preview text & images, download files individually or all at once
🔗Dead Link CheckerScan for broken links — paste HTML or URLs, detect 404s, dead domains & redirects
💾Disk Space AnalyzerScan any folder and see which files & subfolders eat your disk — interactive tree with size bars. 100% local
🔍KQL Query Generator44 production-ready Microsoft Sentinel KQL templates across 10 categories — export .kql
🧩KQL Pipeline VisualizerPaste any KQL query and see it broken down step-by-step as a colour-coded visual pipeline
⏳Memento MoriVisualise your life in weeks — a raw, honest look at time spent and time remaining
📝Lore GenDeveloper-themed placeholder text — Git commits, terminal logs & cyberpunk fragments
🍅Pomodoro TimerFocus timer with task list, sounds & breaks — no account, no ads, 100% private
📓Deep Work LogPrivate Markdown work journal with auto-timestamps — log progress & export, 100% in-browser
📝Markdown EditorEdit Markdown with instant live preview — toolbar, shortcuts, export HTML/MD/PDF
📋Kanban BoardKanban with WIP limits, checklists, due dates, flow metrics & share links — 100% private
🎧Focus AudioWhite, Pink & Brown noise generator for deep work — procedural, private, no streaming
🧘ZenroomRelaxing & sleep sounds mixer — 16 live nature layers, 14 scenes, 6 visual styles, guided breathing & sleep timer
🔢Word & Character CounterInstant word count, character count, reading time, WPM & text density — 100% private
🛡️CA Policy SimulatorSimulate Entra ID Conditional Access policies — test user, app, location & device conditions before you deploy
📋Log ExplorerDrag & drop any log file — Apache, Nginx, systemd, JSON. Timeline, pattern detection & export. 100% client-side
⌨️Terminal Text AnimatorTerminal typing animations with typos, glitches & sound — share as a link or export video, GIF & PNG
🎸Guitar & Instrument TunerChromatic mic tuner with real-time pitch detection & cents gauge — guitar, bass, uke, violin, cello
🎵Metronome & BPM CounterPrecise Web-Audio metronome with tap tempo, time signatures, subdivisions & a visual pendulum
🐢Song Practice PlayerSlow down songs without changing pitch, loop the hard part, change key & ramp up with a speed trainer
🥁Chord Backing Track MakerPaste any chord sheet and guitar, keys, bass & drums follow it — 14 styles, loops, transpose & WAV export
🔴LED Scrolling BannerType a message and scroll it across the screen as a glowing dot-matrix LED sign — speed, colour, fullscreen
🖐️Hand Tracking InstrumentJam with a band using your webcam — chords, melody, looper, 6 modes, video + WAV recording
🎼Simple Hand Tracking Chords20 named chords, one hand gesture each — play any song's chord chart in the air, 15 instruments
🎵4 Chord Song PlayerPlay 100 famous songs with just C, G, Am, F — finger-count hand tracking, 1 or 2 hands, built-in drum computer
♫Endless Music GeneratorPress play and it composes forever — 8 moods, a seed you can share, a sleep timer, WAV and MIDI export. Algorithmic, not AI
🎹Online Chord Pad with Drums16 chord pads that always fit your key, plus a drum machine, a bass line and 12 instruments — loop, share, fullscreen, export WAV or MIDI
🎹Online Virtual PianoPlay piano with your keyboard — 7 instruments, 2.4 octaves, learn mode, record & export .mid, USB MIDI in
🎸Chord Chart GeneratorGuitar & piano chord diagrams, hear any chord, transpose, and build shareable ChordPro song charts — no practice tracking
📀Bouncing DVD LogoThe bouncing DVD logo screensaver — corner-hit counter, colour changes, custom text, fullscreen
🍎Fake macOS UpdatePixel-accurate fake Apple update screen — harmless fullscreen prank, installs nothing
💙Fake Windows 11 BSODPixel-accurate fake Windows 11 Blue Screen of Death — sad face, climbing percentage, QR & stop code, fullscreen with nothing drawn on top
🪟Windows 95 ScreensaverRelive classic Win95 screensavers in your browser — Mystify, Starfield, 3D Pipes, Flying Windows & more
💾Windows 98 ScreensaverAuthentic Win98 screensavers — 3D Maze raycaster, 3D Pipes, Flying Objects, Flower Box, 3D Text & more
🐍Snake GameClassic retro Snake — fullscreen, swipe, level speed-up, high score. No login, no ads, free
🎵Winamp OnlineClassic Winamp rebuilt and working — your own music, real 10-band EQ, 6 visualisers, 8 skins
⭐Star Wars Opening CrawlCinematic Star Wars screensaver — animated starfield, STAR WARS logo flash, perspective Episode IV crawl, Star Destroyer fly-over
🤖Copilot Prompts for IT Admins54 Microsoft Copilot prompts for IT — Security Copilot, Intune, Entra ID, Azure, PowerShell & Helpdesk
💀You Have Been HackedPrank screensaver for colleagues who forget to lock their computer — fullscreen matrix rain & fake breach console
🏃Pace Lab — Running Pace CalculatorRace target pace, finish times, splits and interval training plans
🎮8-Bit StudioMake 8-bit chiptune loops — 6 chip channels, tracker FX, generator, seamless WAV export
🥁Drum Loop StudioOnline drum machine — 10 lanes, 4 kits, 44 preset grooves, probability & ratchets, WAV export
🔁Live Loop PedalReal-time browser loop pedal — record 4 tracks from your mic, overdub in sync, tap tempo, WAV export
🖌️Pixel EditorBrowser pixel art editor — 8 tools, 48-colour terminal palette, undo/redo, zoom, mirror mode, export PNG
📡Morse Code TranslatorText ⇄ Morse with sound, light & vibration, plus an audio decoder for recordings and your mic — 100% in-browser
🎨Color Palette GeneratorGenerate palettes, extract from images, WCAG contrast checker, color blindness sim, export CSS/Tailwind/PNG
💎Boulder DashRetro cave game — dig diamonds, dodge falling boulders & fireflies · 20 levels · C64 classic
🔐NIS2 Compliance CheckerNIS2 scope checker & Article 21 gap analysis — essential/important entity, 55 controls, export PDF report
☢️Radiation FluxLive NOAA space weather — Kp, solar wind, storm scales, aurora oval — plus a modelled radiation map of 61 places
🚢Port RadarPort chart of the Scheldt & Zeebrugge with buoys and locks, live wind, waves and a two-day tide
⚡Power Grid BelgiumBelgium national power grid monitor — live generation mix, consumption, cross-border flux via Elia
🛸UAP AnalystClassify real declassified UAP cases — FLIR imagery, deadpan AI military assessment, analyst clearance level
🔭Cosmic ObservatoryFree live NASA asteroids near Earth today, ISS tracker, Voyager distance, universe age & cosmic data
🛸Satellite Fly-By PredictorFree ISS & Starlink pass predictor — see exactly when satellites fly over your city with live 3D globe
📡Astronaut ChatterReal NASA astronaut recordings by era, plus the live ISS position & crew — sleep timer, share a moment
📡Deep Space CommsLive NASA Deep Space Network — which dish talks to Voyager, JWST or Mars now, with sky dials, distance ladder & light time
🪐Exoplanet ArchiveExplore 5,000+ confirmed exoplanets — habitability scores, Earth comparisons, random planet generator
🎡Wheel SpinnerSpin the wheel — random name picker, raffles, giveaways & yes/no decisions, fair & shareable
🛰️Satellite LaunchesFree live NASA & SpaceX launch tracker with real-time countdowns, orbital belts & space debris
🌦️Vlaanderen WeerFree live weather for 250+ Flemish towns — rain next 2 hours, 14-day forecast, air quality, pollen, map, friet index
🌐Subnet CalculatorIPv4/IPv6 subnet calculator — CIDR, wildcard masks, VLSM planner, cheat sheet & Bicep export
💧Image WatermarkBatch-add text or image watermarks — position, opacity, rotation, tiling, download as ZIP
🖼️Screenshot BeautifierAdd browser chrome, gradient backgrounds, shadows & padding to screenshots — export polished images
🧩Photo Collage Maker21 layouts — grids, bento, pixel heart, freeform. Filters, captions, undo, export PNG/JPEG up to 3x
📦Image CompressorCompress JPEG, PNG & WebP up to 90% — batch processing, before/after preview, format conversion. 100% client-side
🖼️Bulk Image ResizerResize multiple images at once — by pixels, percentage or preset (Instagram, YouTube, web). Lock aspect, crop/fit/pad, download ZIP. 100% client-side
💳Business Card DesignerVisual WYSIWYG card designer — front & back, templates, QR code, export print-ready PDF
🧾Invoice GeneratorInvoices, credit notes & quotes — PDF or Peppol UBL, bank QR
🖊️WhiteboardInfinite canvas — pen, shapes, text, sticky notes, eraser. Zoom, pan, undo/redo, export PNG/SVG
🍳Recipe ScalerScale recipes, scan from photos with OCR, convert units
🏗Construction Budget TrackerTrack house & apartment build costs vs budget — Excel import, invoices, export
🏠Loan CalculatorMortgage calculator with amortization table and comparison
📈SIP CalculatorSIP, step-up & lumpsum returns with fee drag and inflation-adjusted value
🏘️Rent Indexation CalculatorBelgian rent indexation — health-index formula + EPC correction factors
💰Expense SplitterSplit bills with friends — fewest transfers, bank QR codes, PDF
⌨️Typing Speed TestCheck WPM & accuracy — 1 to 5 minute tests, weak-key drill, certificate
⚛️Periodic Table118 elements — phase slider, electron shells, quiz, trends
💰Tip CalculatorSplit bills, service quality, tipping guides
📊Profit Margin CalculatorMargin, markup & VAT from any two values, discount impact, break-even & industry benchmarks
📈Salary Inflation CalculatorCPI-adjusted earnings for 10+ regions, timeline charts, purchasing power
📉Stock vs InflationNominal vs real returns, lost decade detector, asset class comparison
🧮Equation SolverStep-by-step solver — linear, quadratic, systems of equations & derivatives
%Percentage Calculator11 calculators: % of, % change, VAT, discount, tip, grade, margin, fractions
🎓GPA CalculatorSemester & cumulative GPA, 7 grading systems, goal planner, trend charts
📅Study Schedule GeneratorExam dates & subjects in — personalised day-by-day revision plan out. Smart workload balancing.
📋EduSplitLesson hour planner for teachers — distribute curriculum hours across your timetable, holidays & exam periods blocked.
📚Citation GeneratorAPA 7, MLA 9, Chicago, Harvard, IEEE, Vancouver — DOI & ISBN lookup, BibTeX export
🚀Artemis II TrackerNASA Artemis II mission archive — trajectory, record distance, crew & timeline
🌑Artemis III TrackerNASA 2027 mission — countdown, crew, and the low-Earth-orbit Human Landing System docking plan
🌍Tectonic PulseFree real-time global earthquake dashboard — live USGS seismic radar, magnitude filters & energy counter
🌋Magma WatchFree real-time global volcanic activity dashboard — live eruption radar, alert levels & VEI comparator
🌌Aurora NowFree real-time aurora probability — live Kp index, NOAA Ovation oval, IMF Bz & photography calculator
🌊Oceanic Buoy LiveFree real-time oceanic buoy feed — 1,000+ NOAA NDBC buoys, wave height, swell period, water temp & surf score
✈️Live Flight RadarTrack aircraft in real time near you or any major airport — live ADS-B data, click any plane for details
🌊Tsunami Warning BoardLive DART buoy network, NOAA warnings, seismic triggers & travel-time simulator — usually quiet, gripping when it hits
🏰Europe Castle Map50,000+ castles, ruins, fortresses & palaces across Europe — filter by era, type & country
🏚️Abandoned Places AtlasUrbex map of 41 countries — near me, satellite, GPX export
⚡Europe Power GridLive electricity mix for 29 European countries — map, carbon intensity, cross-border flows & day-ahead prices
⚓Strait WatchLive shipping chokepoint monitor — 10 chokepoints incl. Suez, Panama, Hormuz, Taiwan & Gibraltar
🤖Browser AI LLM30+ local LLMs in your browser — chat with PDFs and images, no login, nothing uploaded
🪨IBM Granite AIGranite Speech 4.1, 4.0-H chat, Docling and multilingual search — in your browser, no login, no server
🗃️SQL PlaygroundRun SQLite online on your own SQLite, CSV or Excel files — charts, ER diagram & 32 practice exercises
⚡AI GigawattsCompare power consumption of the top 10 AI models — training, inference & projections
▐▌Barcode GeneratorGenerate 15+ barcode formats — Code 128, EAN, UPC, Code 39. Download PNG or SVG
🇧🇪Belgian Debt DashboardLive Belgian public debt clock, Debt/GDP KPIs, 10-year chart & EU benchmark — NBB/Eurostat
+ terminal games
🕹 Tetris
🐍 Snake
🏓 Pong
💣 Minesweeper
🔓 Breach (hacking sim)
🎯 IT Bingo
All playable from the terminal — type tetris, snake, etc.
what your support enables
Domain & hosting costs
Your coffee helps keep jasperbernaers.com online, ad-free and fast. Domain renewal, DNS, and Cloudflare services all have a cost — your support covers them so the site stays clean and accessible to everyone.
New tools & features
Every coffee funds a few hours of weekend building time. New tools, improvements to existing ones, bug fixes — it all takes time. Your support is what makes it possible to keep shipping free utilities instead of side projects that collect dust.
Cloudflare Workers
The backend for the webhook tester runs on Cloudflare Workers. The free tier covers basic usage, but as more people use the tool, scale costs add up. Your support keeps this and future backend-dependent tools running smoothly.
Zero ads — forever
There are no ads on this site and there never will be. No banners, no pop-ups, no sponsored content, no cookie consent walls for ad trackers. Your support is the only business model here — and that's by design.
Zero paywalls — forever
Every tool stays free, unlimited, for everyone. No "free tier" that cuts off after 3 uses, no premium upgrade prompts, no feature gates. If it's on this site, it works — fully — for free.
No pressure at all. Using the tools for free is completely fine —
that's exactly what they're here for.
Thank you — it genuinely means a lot. ☕