InterLAB tools

Tools for people launching a product

Free working tools: from idea and estimate to code review and release — plus everyday utilities. Everything runs in your browser.

40 tools
No sign-up
Your data stays on your device

Where to start

The most common jobs — each one opens the right tool straight away.

Got an idea — need a product planIdea → Product blueprint

See how complex your MVP isMVP complexity estimate

Review AI-written code before releaseCode reviewer, incl. AI-written code

Make a QR code with your logoQR code generator

Product path

From idea to release and contract

Tools by stage: shape the product and estimate it, build with AI agents, check quality before release and handle the commercial side.

Stage 17 tools

Idea and design

From a raw idea to agreed requirements, an estimate, a stack and an architecture diagram.

Idea → Product blueprintAn interview about your idea → roles, features, three MVP scope options, priorities and risks. You get a Product Blueprint to start development from.5 steps · 3 MVP options · requirements baseline

MVP complexity estimateProduct type, platforms, modules and integrations → a complexity band, workstreams and the questions you need answered before any honest price.No made-up prices · ~4 minutes

Scope and cost calculatorModules, effort, your rates, complexity factors, dependencies and a risk reserve → a cost and timeline range with every number explained, plus estimate comparison.Your rates · ranges, not guarantees

Technical brief generatorBuild a brief step by step: goal, roles, scenarios, integrations, data, acceptance criteria. You get Markdown to copy or download.11 steps · saved in your browser

Requirements interviewerAn adaptive client interview → roles and permissions, functional and non-functional requirements, conflicts, acceptance criteria and an approved baseline with sources.15 areas · baselines and changes · spec/CSV

Tech Stack AdvisorCompare technologies within one layer by product fit, team experience, maintenance cost, performance and security — with hard constraints, the conditions that change the answer, and an ADR export.5 domains · 5 dimensions · ADR

Architecture CanvasA visual graph of services, APIs, databases, auth and integrations with structural checks, versions and Mermaid/JSON export.Graph · 16 checks · Mermaid/SVG/JSON

Stage 26 tools

AI-assisted development and code

Context for agents, code-vs-spec checks, change review, cost tracking and project handoff.

Code reviewer, incl. AI-written codePaste a pull request diff — get findings on security, migrations, tests and architecture with evidence from the code, sorted by severity. The code is never changed.42 evidence-based rules · read-only

MVP health check16 questions about code, access, data, tests and releases. Shows what to check first — no “score out of 100”, no sign-up.16 questions · ~5 minutes

Context VaultProject docs, decisions and constraints in one place: source search, staleness control and task-specific context packs for an AI agent or a new developer.Project folder read locally · task context pack

Spec Drift DetectorRequirements ↔ Git/PR changes: a traceability map, likely drift, changes without requirements and requirements without test evidence — with a reviewer workflow.Diff and requirements · traceability

Project handoffRepository snapshot, architecture, progress, blockers, risks, tests and next tasks → a verifiable handoff package for a developer or an AI agent.Completeness check · HANDOFF.md for agents

Agent cost trackerImport API events (CSV/JSONL) → tokens and spend by project, model and task, retries, budgets and alerts. Prices come from your own price list.CSV/JSONL · budgets · in-browser

Stage 35 tools

UI, testing and releases

Visual consistency, bug reports, flow tests, mock APIs and release readiness.

Release readinessAn evidence-backed check matrix: CI, migrations, backups, a rollback plan, monitoring, risk exceptions and sign-off → a GO / NO-GO decision.37 checks · evidence · GO/NO-GO

Screenshot → Bug reportA screenshot or video → private data hidden, the problem marked up, reproduction steps, a human check and export to GitHub, GitLab or Jira.Masking · steps · GitHub/GitLab/Jira

User flow testerA user-flow builder → ready Playwright tests guarded against running on production, coverage of key routes and a pass/fail results view.Playwright · staging-only · report import

API Mock StudioImport OpenAPI or define endpoints → test data, different HTTP responses, delays and errors, a request log, contract checks and a ready mock server.OpenAPI · console · mock server and MSW

UI consistency checkerDesign tokens vs CSS: off-system colours and sizes, WCAG contrast, screenshot comparison against an approved baseline, and triage.Tokens · contrast · visual diff

Stage 43 tools

Commercial and product

Proposals, change-request costing and demand validation before you build.

MVP validation toolkitHypotheses with thresholds, a landing page and lead form, UTM links, a funnel, interviews and an experiment report → continue, pivot or stop.Hypotheses · funnel · decision

Proposal builderProposal templates for IT projects: scope, phases, estimate, timeline, assumptions and exclusions, versions with number control, approval and PDF.Templates · versions · PDF

Change request calculatorAn approved scope + new requirements → affected modules, extra cost, time and risk, a before/after comparison and a change order that leaves the original agreement intact.Before/after · change order

Utilities

Everyday tools

Quick one-minute jobs: QR codes and barcodes, keys and passwords, converters, images and icons, calculators for prototypes.

4 tools

Camera, NFC and QR

Scan documents and barcodes with your camera, write NFC tags and make QR codes — right in your phone or desktop browser.

QR code generatorA link with UTM tags, Wi-Fi, contact card, email, phone, SMS, place or event → a QR code with your colours, shapes and logo, a readability and print-size check. SVG, PNG and a ZIP batch.Logo · SVG/PNG · ZIP batch

Barcode generator and scannerEAN-13, EAN-8, UPC-A and Code 128 with check digits and a self-check, printable label sheets, recognition with the camera and from photos.EAN · Code 128 · camera

Document scannerShoot a page or upload a photo: edges are found automatically, perspective and shadows are corrected and pages are combined into one PDF. All on your device.Camera · edges · PDF

NFC tag generator and writerA link, Wi-Fi, contact card, phone or text → an NDEF message with a tag capacity check. In Chrome on Android it writes straight to the tag and reads it back; elsewhere you get a .bin file, HEX and a link to open the tool on a phone.Web NFC · Wi-Fi · NTAG213/215/216

5 tools

Network and security

WireGuard and SSH keys and configs, subnets, passwords and JWTs. Keys are generated on your device and never sent anywhere.

Password and passphrase generatorPasswords, passphrases from English or Russian words, PINs and patterns from a cryptographic generator, exact entropy and crack times, and a check of your own password for common weaknesses.Entropy · passphrases · checks

WireGuard config generatorA website cannot be a VPN — but here you build a real WireGuard setup for your server: X25519 keys, wg0.conf with NAT, a .conf and QR code per phone and laptop, subnet and route checks, a ZIP and setup steps. Keys never leave your browser.Keys · wg0.conf · QR · ZIP

SSH key generatorEd25519 and ECDSA P-256 in OpenSSH format with a passphrase (like ssh-keygen), SHA256/MD5 fingerprints and randomart, restricted authorized_keys, ~/.ssh/config and an inspector for any public key. Keys are generated on your device.Ed25519 · passphrase · randomart

JWT decoder, verifier and builderDecode a token part by part, verify HS/RS/PS/ES/EdDSA signatures with a PEM, JWK or JWKS key, see expiry with a countdown, 16 security rules, and build test tokens.Signature · expiry · warnings

CIDR subnet calculatorIPv4 and IPv6: mask, range and exact address count, a binary view with the network boundary, subnetting and VLSM, list merging, overlaps with an address map, reverse DNS zones.IPv4/IPv6 · VLSM · map

7 tools

Developer utilities

Converters, regular expressions, cron, encodings and hashes, images, icons and link previews — live results as you type.

Image compressor (WebP/AVIF)Drop images in — WebP, AVIF or JPEG by quality or a target size in KB, a 1:1 before/after slider, srcset and <picture>, batch ZIP. All in the browser.Batch · before/after · srcset

Favicon and app icon generatorFrom an image, SVG or a letter → favicon.ico, favicon.svg with dark mode, PNGs in every size, apple-touch-icon, maskable, manifest and HTML; tab, iOS and Android previews — in one archive.ICO · SVG · maskable · ZIP

Link preview (Open Graph) checkerPaste HTML or fill in fields and see how a link looks in Telegram, WhatsApp, VK, Facebook, X, LinkedIn and Slack. Checks for og:image, text length and twitter:card, plus a ready <head> block.7 platforms · 25 checks · meta tags and Next.js

JSON, YAML and CSV converterConvert between JSON, YAML and CSV with formatting, key sorting, syntax errors pinned to the exact spot, and a data tree.JSON ↔ YAML ↔ CSV · line-level errors · TypeScript

Regex testerMatches and groups highlighted as you type, replace, a step-by-step breakdown of the pattern, a library of ready patterns and freeze protection.Highlighting · groups · replace · code for 5 languages

Cron expression helperA cron expression ↔ plain language, the next runs in your time zone, a schedule builder and variants for Linux, Quartz, GitHub Actions and Kubernetes.Next runs · time zones · DST

Base64, hashes, UUID and ULIDBase64/base64url, Base32, HEX, URL and HTML both ways, hashes of text and files of any size (SHA-256, SHA-3, BLAKE3, MD5, CRC-32), HMAC, checksum verification, generating and inspecting UUID v4/v7, ULID and NanoID.Streamed files · HMAC · UUID v7

3 tools

Calculators for makers

Unit economics with charts, electronics for prototypes, and cloud and LLM costs — change a number and see the effect at once.

Unit economics calculatorLTV, CAC, payback, margin and break-even with live charts, scenarios and sensitivity: which input moves the result the most.Live charts · scenarios · 3:1 goal

Cloud and LLM cost calculatorServers, databases, storage, traffic, serverless and LLM tokens → a monthly budget by item, a 12–36 month growth projection, up to three options side by side and break-even. Prices are yours or from a sourced, dated price list.Budget · growth · comparison · break-even

Electronics calculatorOhm's law, a voltage divider with E12/E24/E96 pair search, LED resistor, colour and SMD codes, battery life, RC circuits and wire voltage drop — with schematics that update as you type.Ohm · divider · LED · codes · battery

How the tools work

Transparent rules

Results follow published rules, not a black box: each tool explains how it works and what it leaves out.

No false precision

No “security score 87/100”. Money is calculated only from your rates and shown as an explained range; cost and time estimates are not guarantees.

Privacy

Calculations and the analysis of files and code run in your browser: nothing is uploaded to a server. Drafts and versions stay with you. If you send us a request, you can attach a short summary of the result — the form shows what will be sent, and passwords, keys and files are never included.

Not a substitute for an engineer

An automated check is a hint, not a technical verdict: every finding shows its rule and evidence, and a person makes the call. External actions happen only on your command.

Tell us about your task — we'll review your request and get back to you

Want to go through the result with an engineer?

The first short conversation is free: we will understand the task and suggest the right format — a consultation, an audit or development.

The first short conversation is free — we choose the format
NDA — yours or ours
Pricing after a brief and an agreed scope

Message on WhatsApp