usefulweb.site: 294 focused tools that just work

• 
  

  Kerfwise

  Cabinet & furniture CAD

  Design cabinets and furniture, get cut lists, optimised sheet layouts, costs and drawings.

  • 16 parametric cabinet & furniture types incl. diagonal, L-shaped and angled corners
  • Kitchen planner: snapping runs, mitred or one-piece L worktops
  • Cut list + polygon-aware sheet nesting with lower bound
  • CNC G-code (GRBL, LinuxCNC, Fanuc) with drilling and toolpath preview
  • Costs, hardware, drawings, DXF/SVG/CSV export
  • Runs in the browser, saves locally, free

  Launch Kerfwise Learn more: Kerfwise

• 
  

  Kinetica

  Robot motion studio

  Simulate robot arms in your browser: kinematics, trajectories, collisions, program export.

  • Jog a 6-axis arm and drag its TCP with live inverse kinematics
  • PTP, LIN and CIRC moves with S-curve profiles and blending
  • Collision and self-collision checks along the whole path
  • URDF, CSV, G-code and KRL/RAPID-style program export

  Launch Kinetica Learn more: Kinetica

• 
  

  Threadsmith

  Embroidery digitizing studio

  Draw or import artwork, turn it into stitches, export DST, PES, JEF or EXP files.

  • Running, satin, tatami, contour and motif stitches with real underlay
  • Built-in embroidery lettering (also on an arc), SVG import and bitmap auto-trace
  • Thread-look preview, stitch-out simulator and density heat map
  • Exports Tajima DST, Brother PES, Janome JEF and Melco EXP — every file re-read and verified
  • Free, local-first: autosaves in your browser, no account

  Launch Threadsmith Learn more: Threadsmith

• 
  

  Ohmforge

  Virtual electronics workbench

  Draw a circuit, switch it on, and measure it with real-feeling bench instruments.

  • Schematic editor + SPICE-style simulator in the browser
  • Oscilloscope, multimeter, Bode plotter, generator, bench supply and parameter sweep
  • Animated current flow and burnt-out parts when you overload them
  • SPICE netlist import/export with .param and .subckt, SVG/PNG/CSV/BOM exports
  • Free, no login, projects stay on your device

  Launch Ohmforge Learn more: Ohmforge

• 
  

  Twinworks

  Factory digital twin & production simulation

  Model a production line, simulate it and find the bottleneck — free, in your browser.

  • Draw a factory, press play, watch parts flow and the bottleneck light up
  • Real statistics: warm-up, replications and confidence intervals
  • OEE, Little’s law, state Gantt and cost per good part out of the box
  • What-if scenarios, buffer sweeps and a buffer allocation optimiser
  • Runs locally, saves to your browser — no account, no upload

  Launch Twinworks Learn more: Twinworks

• 
  

  Agentlab

  AI-agent & LLM workbench

  Test an AI agent before release: permissions, traces, costs, citations and output checks.

  • Release gates that pass or fail an AI agent before it ships
  • MCP permissions, tool poisoning and tool-definition drift in one review
  • Batch-validate structured outputs and routing test sets
  • Cost sweeps and scenario A/B on dated OpenRouter prices
  • Twelve usefulweb.site AI tools behind one workbench

  Launch Agentlab Learn more: Agentlab

• 
  

  Bundlekeep

  Local project backup

  Back up projects from every usefulweb app into one file, check it and restore any part.

  • Scans saved projects in all 26 premium apps, read-only and only when you ask
  • Recognises 54 project formats and says what a file leaves out
  • SHA-256 checksum for every file, verified whenever you open the backup
  • Restore one file, a selection or a ZIP — app storage is never overwritten
  • Everything stays on your device; API and MCP tools for agents

  Launch Bundlekeep Learn more: Bundlekeep

• 
  

  Chainscope

  Web3 investigation desk

  Investigate transactions, bridges, contracts, DAOs and wallets in one case file.

  • Fifteen web3 tools behind one investigation case file
  • Findings dashboard, merged entity graph and timeline
  • Results suggest the next check: block → MEV, proxy → implementation
  • Run history, A/B comparisons and batch runs over many hashes
  • Printable report, CSV/JSON/Markdown exports and .ics reminders

  Launch Chainscope Learn more: Chainscope

• 
  

  Chartroom

  Data & charts studio

  Import data, chart it, run analyses and publish a report — one workspace, free.

  • Import CSV or Excel, chart it live, and run real analyses on the same data
  • Trends, anomalies, maps, A/B tests and freshness checks in one workflow
  • Public data in a click: electricity, spending, package downloads, web archive
  • Snapshots and re-runs show what changed over time
  • One report with findings: print to PDF, embed or share — no account

  Launch Chartroom Learn more: Chartroom

• 
  

  Fieldday

  Sports club & training organiser

  Fixtures, brackets, ratings and training plans for your club — in one workspace.

  • One roster feeds mixer nights, brackets, a league, ratings and training
  • Every scored match updates Elo and Glicko-2 ratings automatically
  • League title odds with what-if scenarios compared side by side
  • Road-trip fatigue, jet-lag plans and an .ics club calendar
  • Runs in your browser — no account, autosave, share links

  Launch Fieldday Learn more: Fieldday

• 
  

  Flipline

  Drawing, storyboards & animation

  A few drawings. A little life. Make a flipbook in your browser.

  • Local drawing and frame-by-frame animation
  • Onion skins, layers, transform handles and automatic inbetweens
  • GIF, video, PNG sequence, sprite sheet and storyboard exports
  • Drawing brushes, pixel art, comics, storyboards and eighteen tools for people and AI agents

  Launch Flipline Learn more: Flipline

• 
  

  Hearth

  Home & travel planner

  Plan meals, chores, home care, a move and trips for your whole household in one place.

  • One household project drives 17 planning tools
  • Fridge check → recipe ideas → dinner plan → shopping list
  • Fair chores that remember who did what
  • Moving scenarios, furniture fit checks and room layouts
  • Jet lag, connections and travel money in one trip plan
  • Runs in your browser — autosave, files, share links, no account

  Launch Hearth Learn more: Hearth

• 
  

  Keysmith

  Crypto & secrets lab

  Audit certificates, keys, TLS and passwords in one lab; secrets stay on your device.

  • Certificates, keys, TLS, checksums and passwords audited in one dashboard
  • Hashes, HMAC, PBKDF2, file encryption and Shamir run in your browser
  • Expiry timeline with .ics reminders and key ↔ certificate pairing
  • TLS scenario A/B, run history and batch decoding
  • Fourteen usefulweb.site security tools behind one workbench

  Launch Keysmith Learn more: Keysmith

• 
  

  Ledgerly

  Household finance & life-admin desk

  Budgets, bills, subscriptions, loans, contracts and deadlines on one private desk.

  • One check-up runs 25 money and life-admin tools over your own household data
  • Bank CSV import, budget vs. actual and a recurring-payment finder
  • Contract notice dates, decoded letters and renewals in one calendar with .ics export
  • Loan plan B, decision toolbox with A/B comparison and a printable household report
  • Stays in your browser: no account, no bank login, nothing uploaded except tool inputs

  Launch Ledgerly Learn more: Ledgerly

• 
  

  Lumina

  Photo editor & image toolkit

  Bring out what you saw. A free photo studio, right in your browser.

  • Edit photos on your device, with no upload
  • Reversible adjustments, color mixer, looks, on-photo crop and styled text
  • JPEG, PNG and WebP exports, plus editable projects
  • Twenty related tools available through API and MCP

  Launch Lumina Learn more: Lumina

• 
  

  OBSCURIQ

  OSINT case desk

  Organize public-source research: cases, a research log, pivots and indicators.

  • Separate cases with a timestamped, reviewable research log
  • Search, archive, ICANN and blockchain-explorer pivots — only on your click
  • Domain, archive and transaction lookups through usefulweb.site tools
  • Indicator extraction, defanging and a local file inspector
  • Timeline, printable case report and portable workspace files

  Launch OBSCURIQ Learn more: OBSCURIQ

• 
  

  Opsdeck

  Developer & ops workbench

  One deck for CI failures, cron, traces, k8s events, API diffs, query plans and Terraform.

  • Eighteen developer and ops tools behind one paste box
  • Ranked findings with triage, fixes and actions
  • Release gate with go/no-go rules over every result
  • Scenario A/B and comparisons over time
  • Business-day due dates, reminders and a fair review meeting
  • Secrets masked in the browser before anything is sent

  Launch Opsdeck Learn more: Opsdeck

• 
  

  Pageboard

  Website inspiration boards

  Collect website references, sort them with tags and arrange them on a moodboard.

  • Your own screenshots and links, organized by section, platform and tags
  • Spatial moodboard with keyboard control and PNG export
  • Editable JSON, standalone HTML and filtered exports
  • Accessibility review with automated and manual checks

  Launch Pageboard Learn more: Pageboard

• 
  

  Panelcraft

  Comic books & figure references

  Shape a page. Arrange a book. Give your story a voice.

  • Multi-page books, panels, dialogue and screentones
  • Posed mannequin references and reusable page recipes
  • Local autosave, editable files and clean art exports
  • Four shared deterministic tools with API and MCP

  Launch Panelcraft Learn more: Panelcraft

• 
  

  Paperwell

  Document studio: PDFs, OCR, redaction, forms & contract reading

  Your paperwork in one dossier: PDF tools, OCR, redaction, forms and contract reading.

  • Seventeen document tools in one dossier, with every result kept and linked
  • Contract clauses, privacy practices and law changes in plain language
  • Last day to cancel, as a calendar file with reminders
  • Redaction suggestions and before/after verification
  • Batch recipes that queue, wait for rate limits and retry by themselves

  Launch Paperwell Learn more: Paperwell

• 
  

  Proofline

  Math notebook

  Solve, graph, test and visualise in one notebook — with data, findings and a report.

  • Thirteen real calculators as notebook cells — symbolic, numeric, statistical and algorithmic
  • One dataset flows into many analyses, with out-of-date tracking
  • Batch runs, A/B variants and run history for every cell
  • Pinned findings and a printable report with figures
  • Autosaves locally — no account, share by link or file

  Launch Proofline Learn more: Proofline

• 
  

  Provenance

  Software supply-chain security desk

  SBOMs, CVEs, containers and licences in one risk register — free, in your browser.

  • Twelve security tools on one project: SBOM, CVE, container, licence, provenance, trust
  • One findings register with CISA KEV / EPSS priority, triage and due dates
  • Release gate, fix plan, baselines over time and A/B comparisons
  • Printable report, CSV/JSON/Markdown exports and calendar reminders
  • Projects stay in your browser — no account needed

  Launch Provenance Learn more: Provenance

• 
  

  RavingDesk

  Paper trading workspace

  Practise trading on paper: orders, ledger, risk, exposure and journal. No real money.

  • Paper orders, fills and positions with sources
  • Risk sizing, exposure and a portfolio shock check
  • Crypto round-trip and Ethereum gas cost planners
  • Local-first, no broker, no real orders

  Launch RavingDesk Learn more: RavingDesk

• 
  

  Reelcraft

  Audio, video & image batch studio

  Audio, video & image batch studio: cut, convert, compress, subtitle, reframe

  • Chain cut, reframe, compress, normalise, tag, subtitle and image tools into recipes
  • Batch runs over many files with a rate-limit-aware queue and retries
  • Delivery checks for Reels, podcasts, e-mail and web images
  • A/B variants, loudness board, privacy sweep and a printable report
  • Files stay on your device; results are kept locally after each run

  Launch Reelcraft Learn more: Reelcraft

• 
  

  Renderloom

  3D scene & material studio

  Shape a scene. Find its light. Keep every idea editable.

  • A dedicated 3D scene workspace with precise solids and saved cameras
  • Local rendering with six passes and four-light comparisons
  • Texture Lab exports reusable material maps and recipes
  • Figure Lab inserts stylized parametric scale figures
  • Editable scenes, local autosave, PNG/SVG and OBJ/STL exports

  Launch Renderloom Learn more: Renderloom

• 
  

  Signalhouse

  Website & internet infrastructure inspector

  Inspect DNS, TLS, mail, CDN and routing of all your domains — and see what changed.

  • One run over your whole domain portfolio: DNS, TLS, mail, HTTP, CDN, IPv6 and routing
  • Scorecard, merged findings with triage and a deduplicated fix plan
  • See what changed since the last run or a pinned baseline
  • Renewal calendar for certificates and domains as an .ics file with reminders
  • Runs in your browser; checks use usefulweb’s public, passive tools

  Launch Signalhouse Learn more: Signalhouse

• 
  

  Tonegrid

  Tone matrix & beat sequencer

  Light up squares to build looping melodies and beats, then arrange them into songs.

  • Melody matrix plus a separate drum grid, 1–32 steps each
  • Nine scales, five synth voices, tempo, swing and a mixer
  • Patterns A–H chained into a song arrangement
  • WAV and MIDI in your browser; MP3 and loudness via site tools
  • Keyboard-playable grid, never plays sound on its own

  Launch Tonegrid Learn more: Tonegrid

Explore all premium apps →