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Show HN: FileMock – Generate test files for developers and QA engineers

https://filemock.com
1•humast•19h ago
Hi HN! I built FileMock to solve a problem I constantly faced as a developer where I needed mock files for testing uploads, APIs, and storage systems.

Key features: • Generates video, audio, image, and document files with precise size control • 100% client-side processing • Supports 20+ formats: MP4, PDF, PNG, MP3, DOCX, etc. • No registration required, just visit and generate

Perfect for testing file upload limits, API endpoints, storage quotas, and CI/CD pipelines. I've been using it daily for the past few weeks and thought others might find it useful too.

The entire generation happens in your browser using Canvas API, Web Audio API, and FFmpeg.wasm for video processing. No server uploads means instant generation and complete privacy.

Would love feedback from the community via the in-app Suggestion form! What file formats or features would be most useful for your testing workflows?

AI-Designed Enzymes Break Down Plastic in Hours

https://earth.org/plastic-eating-enzyme/
1•karlperera•2m ago•1 comments

Sharding Postgres at Network Speed

https://pgdog.dev/blog/sharding-postgres-at-network-speed
1•GarethX•6m ago•0 comments

KIRA project launches Germany's first autonomous public transport shuttles

https://urban-mobility-observatory.transport.ec.europa.eu/news-events/news/kira-project-launches-germanys-first-autonomous-public-transport-shuttles-2025-06-13_en
1•taubek•8m ago•0 comments

Claude Code: My Most Trusted Coworker and My Worst Enemy

https://lopezb.com/articles/claude-code-my-most-trusted-coworker-and-my-worst-enemy
1•GarethX•9m ago•0 comments

Lethal Cambodia-Thailand border clash linked to cyber-scam slave camps

https://www.theregister.com/2025/07/31/thai_cambodia_war_cyberscam_links/
1•romaniitedomum•14m ago•0 comments

Ask HN: How do you measure "AI slop"?

2•crakhamster01•14m ago•0 comments

Agntcy: Building Infrastructure for the Internet of Agents

https://agntcy.org
1•thebeardisred•17m ago•0 comments

Gödel: The Limits of Logic and the Foundations of Modern Mathematics

https://quantumzeitgeist.com/godels-incompleteness-theorems/
1•bryanrasmussen•21m ago•1 comments

Categorising My Daily Todo List with Deepseek-R1

https://www.bentasker.co.uk/posts/blog/software-development/ai-todo-list-categorisation.html
2•furkansahin•23m ago•0 comments

Dine and dash mental health toll on restaurant staff

https://www.bbc.co.uk/news/articles/cjd24ky4818o
1•mellosouls•24m ago•0 comments

LangExtract: A Gemini powered information extraction library

https://developers.googleblog.com/en/introducing-langextract-a-gemini-powered-information-extraction-library/
2•thebeardisred•24m ago•0 comments

C++: "model of the hardware" vs. "model of the compiler" (2018)

http://ithare.com/c-model-of-the-hardware-vs-model-of-the-compiler/
1•oumua_don17•26m ago•0 comments

If the Coronation of Charles II Had Event Marketing

https://www.youtube.com/watch?v=MtJvrjiSmds
1•zb9461•27m ago•0 comments

Dificulties with development of anonymous location bsed chat App

http://158.101.167.252/dificulties-with-development-of-anonymous-location-bsed-chat-app/
1•aizej•31m ago•1 comments

I Built a Modern CSS Formatter to Replace CSSComb

https://n8d.at/old-fashioned-css-formatter-a-modern-successor-to-csscomb/
2•Birkoff•31m ago•1 comments

Leaving LinkedIn

https://www.onepict.com/20250730-linkedin.html
1•ColinWright•34m ago•0 comments

Printer Tracking Dots

https://en.wikipedia.org/wiki/Printer_tracking_dots
4•Michelangelo11•34m ago•0 comments

Requests for Startups F25

https://www.ycombinator.com/rfs
2•doppp•41m ago•0 comments

Web Scraping Challenges: 12 Barriers and How to Beat Them

https://whoerip.com/blog/web-scraping-challenges/
1•whoerip•41m ago•0 comments

Our Small Agency Generated 11 Tons of CO2 Using AI–Here's Our Next Step

https://www.davidlambauer.de/how-discovering-our-ais-co2-impact-changed-my-perspective/
1•herrmaier•42m ago•0 comments

Invincible Title Card Generator

https://www.invincibletitlecardgenerator.com/
1•cnych•43m ago•0 comments

MyUniverse

https://myuniverse-zche.onrender.com/
1•immercato•45m ago•0 comments

Woman Who Died of Heart Disease in ICE Custody Wasn't Allowed to See Doctor

https://reason.com/2025/07/30/woman-who-died-of-heart-disease-in-ice-custody-reportedly-told-son-she-wasnt-allowed-to-see-doctor-for-chest-pains/
4•perihelions•45m ago•0 comments

Zigzag Number Spiral

https://susam.net/zigzag-number-spiral.html
1•susam•50m ago•0 comments

Trump Administration Pushes for Clear Crypto Rules in New Report

1•AbdulHype•53m ago•0 comments

Labubu

https://en.wikipedia.org/wiki/Labubu
2•downboots•53m ago•0 comments

Gerald Jay Sussman on Flexible Systems (2021) [video]

https://www.youtube.com/watch?v=JbyAcZf6tds
1•tosh•54m ago•0 comments

Show HN: VibeTree – Parallel Claude coding with Git worktrees

https://github.com/sahithvibudhi/vibe-tree
2•vibudhi•57m ago•0 comments

A5 Geospatial Index

https://github.com/felixpalmer/a5-py
2•pheelicks•57m ago•1 comments

Mounting the Atmosphere

https://oppi.li/posts/mounting_the_atmosphere/
2•Bogdanp•58m ago•0 comments