itch.io

Hey everyone! I made PackPix, a small offline tool that turns a batch of PNG frames into a packed sprite sheet — right in your browser.

• Drop in PNG frames (or load demo frames) — processed locally, nothing is uploaded
• 3 free layouts / 6 full layouts including MaxRects dense packing
• Padding 0–16 px, live atlas preview with numbered cells, fill ratio stats
• Trim transparent margins & 90° rotation, power-of-two sizing (full edition)
• One-click PNG export; JSON atlas + batch ZIP export (full edition)
• Deterministic packing — the same frames always produce the same sheet
• One HTML file — double-click, no install, nothing ever leaves your computer, works offline forever
• English & Japanese UI

Free edition (3 layouts, PNG export): https://capsuloom.itch.io/packpix
Full edition ($5 — MaxRects, JSON atlas, batch ZIP): https://capsuloom.itch.io/packpix-full

It's made by me, so feedback is very welcome — happy to hear which layouts or export formats you'd want next.

Hey everyone! I made RetroSample, a small offline tool that turns any audio file into crunchy retro console sound — right in your browser.

• Drop in WAV, MP3, OGG or M4A — decoded locally, nothing is uploaded
• Bit-depth reduction (16 down to 2 bits) and sample-rate reduction (44.1 kHz down to 2 kHz)
• 6 free presets / 16 full console presets (NES, Game Boy, C64, Atari 2600, Telephone, Calculator, and more)
• Wave shaping — square, pulse 25/50/75%, sawtooth, triangle (full edition)
• Before/After A-B preview, mono downmix, normalize, one-click WAV export
• Batch ZIP export, silence trim & edge fade (full edition)
• One HTML file — double-click, no install, nothing ever leaves your computer, works offline forever
• English & Japanese UI

Free edition (6 presets, bit crusher): https://capsuloom.itch.io/retro-sample
Full edition ($5 — 16 presets, wave shaping, batch ZIP): https://capsuloom.itch.io/retro-sample-full

It's made by me, so feedback is very welcome — happy to hear which consoles or options you'd want next.

Hey everyone! I made SFX Forge, a small offline tool for generating retro game sound effects — jumps, coins, lasers, explosions and more — right in your browser.

• 3 waveforms free / 6 waveforms full (square with pulse width, sawtooth, triangle, sine, white & brown noise)
• 8 free presets / 48 full across 8 categories
• ADSR envelope, low/high-pass filter, live waveform preview (vibrato & feedback delay in the full edition)
• One-click WAV export, one-click batch ZIP export of every preset (full edition)
• One HTML file — double-click, no install, nothing ever leaves your computer, works offline forever
• English & Japanese UI

Free edition (3 waveforms, 8 presets): https://capsuloom.itch.io/sfxforge
Full edition ($5 — 48 presets, batch export): https://capsuloom.itch.io/sfxforge-full

It's made by me, so feedback is very welcome — happy to hear which sounds or options you'd want next.

Hey everyone! I made PixCrunch, a small offline tool for shrinking images before you upload them — to itch or anywhere else.

• Batch process PNG · JPEG · WebP · GIF · BMP in → PNG / JPEG / WebP out
• Resize: scale %, fit within a bound, or max width
• Quality presets (Smaller / Balanced / Crisp), live before/after comparison, total saved
• Download all results as a ZIP
• One HTML file — double-click, no install, nothing ever leaves your computer, works offline forever
• English & Japanese UI

Free edition (10 images per run): https://capsuloom.itch.io/pixcrunch
Full edition ($5 — unlimited batches + target-size mode): https://capsuloom.itch.io/pixcrunch-full

It's made by me, so feedback is very welcome — happy to hear which formats or options you'd want next.