The Best Free Browser Tools for Product Managers
Product managers live in documents, data, and communication. Writing sharp specs, comparing requirements across versions, tracking user flows through URLs, and creating shareable materials for stakeholders are daily activities. The tools at tools.fun give PMs quick, browser-based utilities for the small but time-consuming tasks that don't need a full suite — no installs, no subscriptions, just instant results.
Character & Word Counter
Character limits are everywhere in product work. App Store descriptions have a 4,000-character limit. Google Play short descriptions cap at 80 characters. Push notification copy needs to stay under 100 characters. Meta descriptions for feature announcement blog posts should be under 160 characters. The character counter helps you write tight, within-limit copy without guessing.
Text Diff Tool
Requirements change. PRDs get revised. User stories get updated. The diff tool makes it trivial to compare two versions of a spec, user story, or acceptance criteria document and see exactly what changed. This is invaluable during sprint planning when you need to communicate changes to engineers clearly, or during stakeholder reviews when you need to show what was modified since the last version.
QR Code Generator
QR codes are a PM's underrated tool. Use them to link prototype URLs in physical user research sessions so participants don't have to type long URLs, to create scannable links on printed agendas that link to the digital version, or to generate codes for product demos at conferences that direct attendees to a landing page or app store listing.
JSON Formatter & Validator
PMs increasingly work alongside engineers and data analysts. Reading API responses during demos, inspecting analytics event JSON for tracking implementation reviews, and understanding feature flag configuration JSON are skills that help PMs communicate more effectively with technical teams. The JSON formatter makes these payloads readable without any technical setup.
URL Encoder / Decoder
UTM parameters, campaign tracking URLs, and deep links are core PM tools for measuring feature adoption and marketing effectiveness. Understanding how URL encoding works — and being able to decode a garbled UTM-tagged URL from a campaign report — helps PMs verify tracking is working correctly and ensures attribution data is accurate.
Unix Timestamp Converter
Analytics platforms, A/B testing tools, and database exports often show Unix timestamps instead of human-readable dates. When reviewing experiment results, analyzing user behavior data, or interpreting database query outputs during data reviews, the timestamp converter quickly translates epoch values into the dates and times you actually need to make decisions.
Regex Tester
PMs writing acceptance criteria for input validation features — email addresses, phone numbers, postal codes — benefit from understanding what regex patterns actually match. Testing validation patterns against real user input examples helps you write more precise acceptance criteria and have more informed conversations with engineers about edge cases.
Color Picker & Converter
Product managers working on branding, design reviews, or marketing materials regularly need to work with color codes. Verifying that a design mockup uses the correct brand hex color, converting colors for different contexts (hex for web, RGB for print briefs), or picking accessible color combinations for inclusive product design are all practical PM use cases.
Code to Image
When writing technical specs that include code examples, API endpoint documentation, or configuration snippets, sharing code as a formatted image rather than raw text makes documents more readable — especially in presentations, Notion pages, and Confluence documents where code blocks don't always render correctly. The code-to-image tool makes this instant.
Password Generator
PMs manage access to numerous tools: analytics platforms, A/B testing services, customer data platforms, and project management tools. Using strong, unique passwords for each — and generating new ones when team members rotate off projects — is basic operational security. The password generator produces strong random passwords on demand.
Great product management is about reducing friction — for users and for yourself. Bookmark tools.fun for the quick utility moments that come up throughout your product workday, and keep your focus on the decisions that matter.
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