rankedslither
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Competitive slither.iowith a real ELO ladder.

rankedslither adds ranked ELO, XP levels, a global leaderboard, and a shop on top of slither.io. Play casually with any nick, or sign in and grind Play Ranked.

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Free to useWorks on slither.ioPlay without an accountRanked needs sign-in
slither.io
Ranked · ELO 1,248 · 4K · 6,820 pts
mambasnake
Kills
4
Score
6,820
ELO
1,248
+42 on death
Rank
Gold
Level 7640 / 1000 XP
Play Ranked
Play
QualitySettingsSkinServerDashboardShop
What you get

A real game on top of a casual classic.

rankedslither layers ranked stats, XP, and a shop over slither.io without changing how the game plays. Everything runs in your browser as an overlay.

Ladder
Real ranked ELO
Every ranked death settles your match: tier-based kill ELO (14 at Bronze down to 7 at Legend), +1 ELO per 100 score points, and −50 for dying. Eight tiers from Bronze to Legend match your rating.
Progress
XP and levels
Positive ELO gains award XP (10 per point). Level up every 1000 XP — progress shows in the overlay and on your dashboard.
Overlay
Live ranked HUD
During a ranked run the overlay tracks kills and score in real time and shows the ELO swing you would take if you died right now.
Fair play
Slither.io, untouched
We never patch the game. The extension reads the same websocket frames slither.io already sends, so movement, mechanics, and skins stay vanilla.
Stats
Dashboard and leaderboard
Signed-in players get a dashboard with global leaderboard (top 20) and your last 50 ranked matches with ELO before/after.
Economy
Coins and shop
Earn 10 coins every 10 levels from ranked XP and spend them in the in-app shop on cosmetic items configured for your account.
Customize
Skins and backgrounds
Open the game’s skin picker, choose a server region, toggle render quality, and pick custom board backgrounds from Settings.
Servers
Pick any server
Use the built-in server chooser to join the slither.io region you want before you press Play or Play Ranked.
Optional
Account when you want it
Play casually with any nickname. Sign in only when you want ranked ELO, history, coins, XP, and shop items saved to your profile.
Transparent
Match breakdown
After each ranked death you see exactly how points, kills, and the death penalty combined — same math as on this page.
Ranked system

Transparent ELO. No black box.

We don’t hide the math. Every ranked match is scored with one published formula — so you always know exactly why your ELO moved.

The formula
delta = kills × tierKillElo + ⌊score / 100⌋ − 50

Kills and final score both add ELO; kill value scales down as you rank up (14 at Bronze, 7 at Legend). Every death costs 50. New ELO is clamped at 0, so the delta you see is the real change after clamping.

Kill gain
7–14 by tier
Score gain
+1 / 100 pts
Death cost
−50
Rank tiers
ELO per kill by rank

Based on your ELO when the ranked match starts. Higher ranks earn less per kill so the ladder stays balanced.

TierELO rangePer kill
  • Bronze0 – 400+14 ELO
  • Silver401 – 900+13 ELO
  • Gold901 – 1500+12 ELO
  • Plat1501 – 2200+11 ELO
  • Diamond2201 – 3000+10 ELO
  • Champ3001 – 3900+9 ELO
  • Grandchamp3901 – 4900+8 ELO
  • Legend4901++7 ELO
Worked example
7 kills · 18,400 score · 1 death (Gold tier)
+218 ELO
Kill gain
7 × 12
84
Score gain
⌊18,400 / 100⌋
184
Death cost
−50
50
Net ELO change+218

Support Us

Help keep rankedslither running — every contribution on Ko-fi goes toward servers, development, and the community.

Support Us

Stop playing for nothing. Start playing for rank.

Load the extension from GitHub, open slither.io, sign in, and press Play Ranked. Your next death updates ELO, XP, and match history.

Support UsRead the ELO rules